After losing two of three games to the New York Yankees last weekend, the Boston Red Sox reached into their farm system for reinforcements.
The Red Sox called up their top prospect, infielder Xander Bogaerts, ahead of the series opener in San Francisco on Monday night.
Bogaerts, 20, batted .297 with a .388 on-base percentage this year combined between Double-A Portland and Triple-A Pawtucket.
He was ranked the No. 8 overall prospect by Baseball America before the season.
Last month, the Red Sox traded shortstop Jose Iglesias as part of the three-team deal that netted right-handed pitcher Jake Peavy from the Chicago White Sox. The trade was made in part because of the Boston organization's optimism about Bogaerts, who could some playing time behind shortstop Stephen Drew and third baseman Will Middlebrooks.
Bogaerts became the first position player age 20 or younger to get called up by the Red Sox since Dwight Evans in 1972.
The Red Sox made several other moves before Monday's game against the Giants.
David Ross, who was out since June 18 due to a concussion, was activated from the 60-day disabled list. Boston also called up right-hander Brayan Villarreal, who was acquired from the Detroit Tigers as part of the Peavy deal. Villarreal made two scoreless appearances for Pawtucket after going 0-2 with a 20.77 ERA in seven games with Detroit earlier this year.
To clear roster spots for the three new additions, infielder Brock Holt, catcher Ryan Lavarnway and right-handed reliever Rubby De La Rosa were optioned to Pawtucket.
Right-handed reliever Andrew Bailey (right shoulder surgery) and right-handed starter Clay Buchholz (strained neck, bursitis in right shoulder) were transferred from the 15-day DL to the 60-day DL, clearing spots on the 40-man roster for Bogaerts and Ross.