The 6-foot-5 right-hander is one of Boston’s top pitching prospects, but his big league pedigree is a mixed bag. Last year, he threw 69 innings in 18 appearances and made 13 starts, compiling a 3.52 ERA. In his brief big-league career, he only earned one win, but did manage to post a 3.20 xERA and 3.20 FIP.