Last night, the New York Yankees completed what to this point constitutes the second-most significant trade of the month when they sent three prospects to Baltimore in exchange for a few months of closer Zach Britton’s services.
The Orioles drafted Britton out of high school in 2006, and Britton debuted five years later as a full-time starter for Baltimore in 2011. By 2014, he had transitioned to a full-time bullpen role, and my earliest memories of him date to two years after that.
Britton was a key part of the 2016 Baltimore team that finished second in the AL East and made the postseason as a wild card. That was the Orioles’ last playoff appearance, and manager Buck Showalter’s decision not to use Britton as the win-or-go-home contest went into extra innings granted the game an air of infamy.
Prior to that, writer Ben Lindbergh memorably made the case that Britton, a closer who would pitch sixty-seven innings that season, merited serious consideration for the AL MVP award. As recorded contemporaneously in these digital pages, Lindbergh’s argument was based on a modification to the notion of Win Probability Added (WPA):
Earlier today, Ben Lindbergh argued that Baltimore reliever Zach Britton has a claim to the 2016 AL MVP award. To make that case, Lindbergh demonstrated that Britton had done more than any other player to help his team win games that mattered. Lindbergh did this by placing Britton’s performance in the context of the individual games in which Britton pitched– did Britton’s actions help or hurt his team’s chances of winning that game, and to what degree did they do so?– and then placing those games in the context of his team’s position in the playoff hunt. Viewed this way, Britton (excellent contributions to a good team in close contention) is more valuable than, for example, Mike Trout (superlative contributions to a bad team far out of contention). The metric that captures this contextual performance concept is called Championship Probability Added (cWPA), and Britton currently holds a commanding lead atop that leaderboard.
The road has been a bit rough for Britton since that 2016 season, however, as the trade article linked above summarized:
After consecutive two-win seasons in 2015 and 2016, he has missed time with the following injuries:
- April 16, 2017 – Hits the disabled list with a strained left forearm and misses a little over two weeks.
- May 6, 2017 – Almost immediately after return from disabled list, goes back on it with same injury.
- August 25, 2017 – Injures his left knee and is shut down in September.
- December 2017 – Hurts his right Achilles in an offseason workout requiring surgery.
The lefty returned to action on June 12 but hasn’t been lights out like he was before 2017, with a 4.43 FIP and 3.45 ERA thus far. He’s been a bit better of late, tossing eight straight scoreless outings, but has still produced just six strikeouts against four walks in that span. Perhaps more encouragingly, his velocity is up over his last few outings, getting closer to the 97 mph sinker he used to throw. If the velocity return is here to stay, better results might follow.
By a clear margin, Britton led all pitchers in WPA in 2016. This year, however, he’s nowhere to be found atop that list. That no team has done as little winning as Baltimore (record: 29-73) likely contributed to that shift. Still, the fact that he has a negative WPA (-0.13) for the first time since he moved into the bullpen seems worth noting in light of the foregoing.
As the block quotation immediately preceding the immediately preceding paragraph indicates, there are a number of red flags that suggest that the version of Britton the Yankees acquired (insert reference about Redcoat POWs) last night may be meaningfully different from the one who presented an intriguingly compelling case for consideration as the most valuable player in the American League in 2016.
As a closing addendum, the current leaders in pitcher cWPA for 2018 are Justin Verlander (.023) and Josh Hader (.020).