The artist formerly known as Fausto Carmona was the Phillies’ first transaction influenced by their new analytics department. Roberto Hernandez inked a one-year, $4.5 million deal in December, slotting in at the back of the starting rotation. On MLB Network Radio in early March, GM Ruben Amaro said that Hernandez’s ground ball rate and relative cheapness were factors into the decision to bring him aboard, and seemed to also hint that he expected Hernandez’s home run rate — homers accounted for over 21 percent of his fly balls between 2012-13 — was due to regress as well.
The other obvious factor that likely influenced the Phillies to bring him aboard was the significant improvement in his strikeout rate in 2013 with the Tampa Bay Rays. The right-hander had crossed a 14.1 percent strikeout rate only once: 2007, his first full season in the major leagues, when he posted a 15.6 strikeout rate. After that, he mostly ranged between 13 and 14 percent. With the Rays, it jumped up to 17.6 percent. In May that season, DRays Bay noted that Hernandez was throwing more change-ups as well as a front-door sinker to left-handed batters.