This past season though, he quickly declined. One potential explanation was his sharp decrease in velocity. According to Pitch Profiler, his average fastball velocity was 93.9 miles per hour. This year, it dropped to 92.4. Correspondingly, his strikeout rate dropped from 20.3 percent to 15.8 percent. With less velocity on his fastball, Irvin's stuff led to contact and did not get Major League hitters out with success.
The workhorse has thrived as a reliever throughout the playoffs, and he's now a critical part of the backend. The 36 year-old came on in a relief role during the six hour and 39 minute Game 3 heartbreak for the Toronto Blue Jays. As you'd suspect, he was as dominant as he could be during his inning of work, not allowing a hit and striking out Enrique Hernández on a 73.3 mph sweeper during an eight pitch inning.