Clay Buchholz surrendered two earned runs over six innings Saturday in a loss to the Orioles.
Red Sox signed RHP Denny Bautista to a minor league contract.
Shane Victorino was scratched from the Red Sox lineup on Saturday due to sore ribs.
Mookie Betts is not in the Red Sox starting lineup for Saturday's game against the Orioles.
Pablo Sandoval (foot) went 1-for-2 and drew a walk in his return to the Red Sox lineup on Friday.
Xander Bogaerts went 2-for-4 with a walk-off RBI single in a 3-2 win over the Orioles on Friday night.
Joe Kelly allowed two runs over 5 2/3 innings in a no-decision against the Orioles on Friday.
Ryan Hanigan launched a two-run homer against the Orioles on Friday.
Mookie Betts went 0-for-3 with a walk Friday against the Orioles.
Brandon Workman was given a platelet-rich plasma injection on Wednesday for his right elbow.
Wade Miley was shelled for seven earned runs in 2 1/3 innings Wednesday as the Red Sox fell to the Nationals.
Hanley Ramirez slugged a two-run homer in Boston's loss to the Nationals on Wednesday.
Jackie Bradley Jr. entered Wednesday with a .367 average in 30 at-bats for Triple-A Pawtucket.
David Ortiz is not in the Red Sox' lineup Wednesday.
Pablo Sandoval (foot) is not in the Red Sox' lineup Wednesday.