In most cases, a player’s end-of-season statistics provide a pretty decent sense of how his campaign went. Are his numbers good? Then he was probably good for most of the year. Below average? Chances are, he was generally weak.
This isn’t the case with Michael Wacha, however. Since the beginning of the 2014 season, Wacha has put up at least 100 innings and a FIP below four every single year. The fraternity of pitchers who’ve done the same is pretty select. Chris Archer, Madison Bumgarner, Carlos Carrasco, Jacob deGrom, Gio Gonzalez, Clayton Kershaw, Dallas Keuchel, Corey Kluber, Jose Quintana, Chris Sale, Danny Salazar, Max Scherzer, Stephen Strasburg, and Justin Verlander are the only others ones to do it. The Cardinals right-hander has joined that group, however, not by means of consistently strong performances, but rather due to a combination of brilliant periods offset by decidedly poor ones.
After taking a no-hitter into the ninth inning on Sunday, Wacha appears to be in the midst of a good stretch currently. Wacha gained notoriety in 2013 when he finished off September with five good starts followed by an excellent run in the postseason before the Boston Red Sox got to him in the World Series. Since then, Wacha has had stretches of being a very good pitcher, but inconsistency and injuries have prevented Wacha from becoming the ace many hoped he would be after his late-season success in his first campaign. The chart below depicts Wacha’s 10-game rolling FIP since the beginning of 2014.

If there’s a pattern, it is that, at some point in every season, Wacha pitches really well for a time before things fall apart and he ends the season poorly. Wacha suffered a stress reaction in his scapula back in 2014, and has worked hard to strengthen his shoulder over the years, but he hasn’t yet found a solution to make it through the season unscathed. Last year was arguably Wacha’s best as a pro, but before a strong September, he struggled in August with a 5.24 FIP and a 6.04 ERA. While it is probably pretty easy to chalk up Wacha’s struggles to injury, breaking down his successes might be more useful in assessing his current talent level.
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