With a number of the Phillies' primary rotation options underperforming, Irvin got his chance to prove that his 2.57 ERA for Triple-A Lehigh Valley in 2018 would translate to the big leagues despite mediocre stuff. In 41.2 innings, the stuff concerns won out, as the lefty stumbled to a 5.83 ERA. He couldn't strike out enough batters (17.1%) or keep the ball on the ground (34.4% groundball rate). His 7.2% walk rate was good, but not at the elite level necessary to make up for those deficiencies. With a fastball that averaged less than 90 mph and no above-average secondary weapons, it's hard to see Irvin making a particularly strong push for the fifth starter spot this season, as good control can only get a pitcher so far on its own. Lefties managed a .935 OPS off of him, so if he does move to the bullpen, it may only be in a mop-up role. There's not much here barring a sudden repertoire change.