Dioner Navarro recently felt some more tightness in his ailing left hamstring while rehabbing at the Blue Jays' spring training complex.
It's not clear at this point how big of a setback it is, but obviously he's not going to be returning for a while. Navarro has already been on the shelf for a couple weeks.
Mariners placed OF Julio Morban on the restricted list.
Morban is dealing with a personal issue, although more details aren't available. It's not clear how long he might be away. Morban is hitting just .194/.315/.323 between Double- and Triple-A this season.
Hanley Ramirez has been diagnosed with a left shoulder sprain.
The Red Sox aren't providing anything more at the moment, but they should have another update on Ramirez's status after Monday's game. Hanley was injured when he crashed into the side wall while trying to chase down a flyball. It seems likely that he'll require a trip to the disabled list, but it's too soon to speculate about the seriousness of the ailment at the moment.
Mariners purchased the contract of RHP Mark Lowe from Triple-A Tacoma.
The veteran right-hander had allowed one run over nine innings for Tacoma, boasting an 11/1 K/BB ratio. Lowe will work in middle relief for the M's.
Jeff Karstens announced his retirement from baseball on Monday.
Karstens is just 32, but his career went off track after a series of shoulder injuries. He was a solid, albeit unspectacular pitcher for parts of seven major league seasons, posting a 4.44 ERA and 1.33 WHIP for the Pirates and Yankees. Karstens hadn't pitched in the majors since 2012.
The Diamondbacks are hopeful that Jake Lamb (foot) will be ready to return by the end of their next homestand that concludes on May 13.
Lamb will have the walking boot removed from his injured left foot on Tuesday and will then ramp up baseball activities. He'll presumably need a short rehab assignment before rejoining Arizona's roster.
Hunter Pence (forearm) is scheduled to take batting practice through Friday.
He'll have had a week's worth of batting practice under his belt by then. Assuming everything goes well, the Giants should then schedule a rehab assignment for Pence. He's tracking towards a mid-May return.
Neil Ramirez (shoulder) is close to resuming throwing off a mound.
Ramirez has been throwing on flat ground for a little while now and is almost ready to take the next step. There's no timetable for his return, but he would seem to have a shot to be back sometime this month if he keeps progressing.