Red Sox manager Chad Tracy said that Patrick Sandoval (biceps tightness) could be back on the mound by the end of the week.

Sandoval spent all offseason continuing his recovery from last year's Tommy John surgery and made two rehab starts at Triple-A in April before being sidelined with biceps tightness. The left-hander is already throwing from 90 feet on flat ground and should return to the mound by the end of this week. Provided that goes well, he could face hitters next week and go back on a rehab assignment shortly after that.