Sox to go to six-man rotation

ST. PETERSBURG, Fla. -- With a number of their young pitchers closing in on innings thresholds, Red Sox manager John Farrell said the club intends to go to a six-man rotation after rosters expand on Monday.

Rookie right-hander Anthony Ranaudo, now 3-0 with the Sox after winning Friday night, was optioned to Class A Greenville to make room for shortstop Xander Bogaerts, who came off the seven-day concussion disabled list. But that move is temporary, with Ranaudo slated to return to face the Yankees on either Wednesday or Thursday in New York.

Brandon Workman, who pitched very well Friday night in Pawtucket’s 2-1 win over Syracuse (6 2/3 IP, 3 H, 1 R, 6 K’s, 2 B’s), is a strong candidate to start one of those games as well.

The other four starters are Clay Buchholz (pitching Sunday), Joe Kelly, Allen Webster (pitching Saturday) and Rubby De La Rosa (pitching Monday). Kelly is scheduled to face the Yankees in the series opener Tuesday night.

Ranaudo (156 innings), Webster (153) and De La Rosa (142 2/3) have all surpassed their career-high workloads, while Workman has dealt with some shoulder fatigue.

"We're getting to the point over the coming weeks with Rubby and Allen, there's going to be an innings threshold we come up against," Farrell said. "We'll figure out a way to keep that in mind."

Farrell said he'd like to keep Buchholz and Kelly on as normal a workload as possible. The Sox do not have an off-day until Sept. 15.