Boston manager Alex Cora was non-committal Saturday when asked if one rehab outing would be enough for Slaten (elbow) before returning from the 15-day injured list, MLB.com reports.
Slaten threw 17 pitches (eight strikes) for Double-A Portland on Friday, giving up a run on one hit and one walk while striking out one over one-third of an inning. Cora said Slaten was fine in terms of health but noted that the right-hander was out of rhythm. The Red Sox will evaluate him this weekend and decide if Slaten needs another rehab outing prior to being activated.