The Yankees are on a certifiable hot streak. 15 of the last 16 games have ended with John Sterling belting out, “THEEEEEEE YANKEES WIN!” They’ve have gotten fantastic pitching from young stars (Luis Severino), old vets (CC Sabathia), and rookies (Domingo German, wow!). There’s been clutch hitting from nearly everyone in the lineup, with a new hero leading the team to victory each day.

There have been a few blowouts, such as the 14-1 obliteration of Minnesota on April 23, and the 11-1 bludgeoning in Anaheim on April 28. But the hallmark of the Yankees’ unbelievable run has been late-inning drama. Incredibly, 6 of the 15 wins featured the go-ahead run in the ninth inning or later. It’s almost too many fairy tale endings to keep track of. Here is a recap of the 5 biggest hits of the hot streak by WPA.

5) May 6: Neil Walker RBI Double, 36% WPA

The aforementioned walk-off bomb from #GleyberGood wasn’t the biggest hit of the game. In fact, it wasn’t even the biggest hit of the inning! Trailing 4-3 entering the bottom of the ninth, Aaron Hicks starting things off with a double. Neil Walker followed with another line drive double to right field, tying the score. Walker’s hit was worth 36% WPA, increasing the Yankee odds of winning from 46% to 82%. After a groundout by Miguel Andujar and an intentional walk to Giancarlo Stanton, Torres increased the win expectancy from 71% to 100% with his moonshot to right-center.

4) May 4: Miguel Andujar Game-Winning Single, 36% WPA

The opening match of the Cleveland series was an emotional whirlwind. The Yankee bullpen blew a 5-0 lead in the top of the 8th inning, thanks to a three-run smash by Bradley Zimmer. In the bottom of the frame, the Yankees regained the lead with a two-out, bases loaded walk by Aaron Judge. However, Aroldis Chapman failed to shut the door, yielding a single to Yan Gomes, a HBP, and two wild pitches. With the score tied at 6 in the bottom of the ninth, Stanton led off with a double. Gary Sanchez flew out to right field and Hicks grounded out to the right side, advancing Stanton to third. Walker walked (which is a fun phrase to type), then took second on defensive indifference. That brought up Andujar, who slapped one into right field on a 1-2 count, scoring Stanton to win the game. The base hit was worth 36% WPA, but perhaps it should be penalized because Didi Gregorius was kicked in the head during the celebration. With all these dramatic wins, you’d think the team would know how to celebrate more safely.

3) April 27: Didi Gregorius 10th Inning Home Run, 38% WPA

In the first game of the road trip, the Yankees trailed the Angels 3-2 in the 9th inning. Brett Gardner hit a sacrifice fly to tie the game with the bases loaded and one out. David Robertson pitched a flawless bottom of the ninth, sending the game to extra innings. With one out in the 10th, Gregorius did this:

The blast increased the Yankees’ chances of winning from 44% to 82%. Chapman nailed down the victory in the bottom of the inning, 4-3 Yankees.

2) May 3: Gleyber Torres Two-Run Single, 39% WPA

Gleyber does make the cut after all! Astros closer Ken Giles was out of commission after getting blown up the day before (and perhaps nursing a bruised jaw), so Will Harris took on the Yankees in the top of the ninth with a 5-3 lead. He surrendered a walk to Walker (there it is again!) and singles to Andujar and Hicks to load the bases with no outs. Brad Peacock came in to face Torres, who lined a single to left to tie the game. Two batters later, Hicks scored on a groundout to give the Yankees the lead, which Chapman preserved for a victory. The Torres single was the big play, of course, improving the Yankees’ win expectancy from 42% to 81%.

1) April 26: UNLEASH THE KRAKEN, 66% WPA

When Sanchez stepped to bat in the bottom of the ninth, the Yankees had just a 34% chance of beating the Twins. They were trailing 3-1 with two men on base and no outs. His blast traveled 381 feet and miraculously stayed inside the foul pole. Everybody goes home, 4-3 Yankees. A WPA event of 30% or higher is rare. A 66% WPA event can almost exclusively be a come-from-behind, walk-off winner like Gary’s. Much like the Yankees’ entire hot streak, it should be savored and remembered.

Photo Credit: Adam Hunger / USA TODAY Sports

Bird’s right foot-the same foot that cost him most of last year- is mysteriously inflamed. In retrospect, the Yankees should’ve prepared for this as an inevitability. While it must be incredibly frustrating for Bird himself, the team just can’t rely on him to play 150+ games in the field. They haven’t announced yet whether or not he’ll start the season on the DL. Even if he returns to action in time for Opening Day, there’s at least a reasonable chance he’ll miss time at some point during the season. Should that happen, here’s where the Yankees will turn for a first baseman, in order of likelihood.

Neil Walker

Other than Bird, there will probably be only four players on the 25 man roster with any first base experience whatsoever. Brandon Drury played one inning at the position in 2013, and Gary Sanchez spent three innings there last year. Both have starting jobs elsewhere and almost certainly won’t be moved to first. Austin Romine barely hits enough to keep his job as a backup catcher, so even though he’s played 20 games at first base, he’s unpalatable as a long-term option. That leaves the most recent Yankee acquisition: Neil Walker

Walker is a 9-year MLB veteran who played second base almost exclusively from 2009-2016. His calling card is offense, and he brings a career 114 wRC+ into this season. He’s never been particularly adept at his natural position, posting -16 DRS and -23.5 UZR for his career. At age 32, he’s more likely to regress than progress, and frankly, he can’t afford to lose any range and stay up the middle. Last year, while playing for the Mets and Brewers, he was asked to spend some time at first base as well as third. Transitioning to the corners may be the key to extending his career into his mid-30s.

There’s another reason why Walker is the best backup first base candidate: Tyler Wade. Improbably, Wade beat out top prospects Gleyber Torres and Miguel Andujar for a spot on the major league roster when the Yankees break camp. The fleet middle infielder impressed the coaching staff with his superior speed and defense. He’s no slouch at the plate either, batting .310/.382/.460 in AAA last year and has a .404 OBP in Spring Training. Manager Aaron Boone already announced plans to use Wade concurrently with Walker at second base, so if the latter moves over to first, there’s an in-house replacement at second.

Tyler Austin

Remember when Tyler Austin was a top prospect? Along with Mason Williams and Slade Heathcott, the Yankee outfield of the future never really materialized. Of the three former can’t-miss stars, Austin has the brightest future remaining. After moving to first base, he finally conquered the high minors in 2016, only to get hurt for most of last season (along with everyone else on the first base depth chart).

At age 26, Austin has nothing left to prove in the minors. He hasn’t hit much in the big leagues so far- just .236/.294/.447 through 136 PA, but the power is real. He’s crushed 4 HR and 2 2B this spring, so his bat looks pretty hot at the moment. If the Yankees aren’t comfortable with Walker at first base, or if Wade fails to hit, Austin will get the first call from the minors (assuming he doesn’t make the team out of Spring Training).

Miguel Andujar

What if the third baseman of the future isn’t a third baseman? Miguel Andujar posted a .850 OPS in AA and AAA last year and shot up the prospect charts this offseason. He followed that up with 7 XBH this spring. No one questions his ability to hit, nor the major league readiness of his bat. The Yankees even felt comfortable enough with him that they traded away Chase Headley before they had other third base alternatives (they’ve since added Drury and Walker, of course).

Most of the time, when a team sends a player down to “work on his defense,” it’s a euphemism for “we’re playing games with his service time.” (See Acuna, Ronald.) However, in the case of Andujar, they might be telling the truth. According to Jarrett Seidler in the Yankees BP Prospect Rankings, “The plus arm strength plays down because it isn’t paired with stellar accuracy. His hands aren’t great, and he doesn’t always make the best of choices on how to play the ball at third, which has led the Yankees to talk about exposing him to other positions, most likely first base.”

It’s too soon to give up on Andujar at the hot corner, so the Yankees aren’t likely to move him to first just yet. However, if Bird misses significant time again and can no longer be trusted with a starting job, Andujar’s future might be at the cold corner instead.

Other Options

The Yankees have two more imperfect options to fill a first base void. There’s Billy McKinney, who is on the 40 man roster but not really a first baseman. There’s also recent Rule V Draft returnee Mike Ford, who is not on the 40 man roster but is a real first baseman. Both showed the ability hit for some power and drew a few walks in the minors as well as Spring Training (though Ford was at the Mariners’ camp). Neither are exciting options at the moment, but if they get hot in the minor leagues, you never know what can happen.

In the event of a significant injury to Bird, perhaps the most likely outcome of all is that the Yankees go outside the organization. GM Brian Cashman still has some room under the $197 million luxury tax threshold as well as an overstocked farm system. Rather than suffer a war of attrition at first base for the second year in a row (third if you count Mark Teixeira’s final season), look for a major acquisition if things get desperate.

Photo credit: Kim Klement / USA TODAY Sports

EJ and Scott discuss the implications of the Neil Walker signing for the Yankees infield and Gleyber Torres.