Overview
- Contreras, who left Tuesday's loss to the Twins with low back tightness after bending for a grounder, exited in the fifth and Andruw Monasterio took over at first.
- Manager Alex Cora said the training staff views the issue as not serious and said rest on Wednesday and Thursday should have him ready for Friday.
- The club does not expect an injured list move, and both Cora and Contreras said the goal is a return for Friday's series opener after two days of rest.
- The setback highlights a thin first-base group, with Triston Casas and Romy Gonzalez still rehabbing and internal contingencies limited to minor leaguers Mickey Gasper or Nick Sogard if needed.
- Contreras has been one of Boston's best bats at .298/.444/.491 with three homers and 11 RBIs through 17 games, raising the stakes of even a brief absence.