The Boston Red Sox want to make sure Justin Masterson is fully ready to go before getting him back on the mound.

The team placed Masterson on the 15-day disabled list Thursday with right shoulder tendinitis, recalling Robbie Ross Jr. from Triple-A Pawtucket to take his place. Masterson has struggled to find success this season, but the Red Sox hope some time off will do the right-hander some good in getting him healthy and back on the right track.

Before Thursday’s game against the Seattle Mariners, manager John Farrell said Boston plans to get Masterson back on the mound soon, but not before he’s nearing full strength.

“There will be a couple of days when the medication starts to take hold,” Farrell told reporters. “At some point in the near future, he’ll get back on the mound to throw a couple of bullpens. But we need to test it at full speed, in a rehab setting, before getting him back on the mound for us.”

Hear more on Masterson in the video above.

Thumbnail photo via Ed Szczepanski/USA TODAY Sports Images