The 32-year-old lefty last started Tuesday, and he left after two innings, having given up four runs, because of a recurrence of the thumb injury that has plagued him since June, Thomas Harding of MLB.com said. It was De La Rosa's shortest start in five years.
By most measures, De La Rosa is having the best season of his career. In 167 2/3 innings, he has a career-low 3.49 ERA, and his 2.9 wins above replacement, according to FanGraphs' calculation, are his best since he was worth 3.5 wins in 2009. His 0.59 HR/9 rate is the best of his career, too. He's done all of those things despite a considerably lower strikeout rate compared to the rest of his career (6.01 K/9 in 2013 compared to a career 7.59 rate).
De La Rosa had Tommy John surgery in 2011 and only pitched 10 2/3 innings in the majors in 2012.