Lester trying to rebound from subpar June

BOSTON -- The good news for Jon Lester heading into Wednesday night's start against the San Diego Padres is that it occurs in the month of July.

June was a little unkind to the left-hander, and although he salvaged a 2-2 record for the month, Lester's numbers weren't great. Actually, it was a statistical aberration for Lester, who's traditionally had his best month in June. For his career, Lester is 19-7 in June with an earned run average of 3.41 -- his lowest ERA relative to all other months.

Yet for this June, Lester saw his ERA balloon to 7.62 with a WHIP of 1.902 over five starts in the month. He also served up nine home runs in 28 1/3 innings pitched.

As to what can explain Lester's anomalous June numbers, Red Sox manager John Farrell cited Lester's lack of execution in key situations.

"It's as much about making pitches in key moments," Farrell said. "There are times that we've met with Jon during a game, and there's times inside of games, when there's multiple guys on, and he's been in situations when he's been ahead in the count, but executing is one thing.

"It's the difference between zero runs, one run and a crooked number on the board."

DREW ON MEND: While he's still unlikely to play in the remainder of the Boston's three-game interleague series against the Padres, Stephen Drew was more active in the lead-up to Wednesday night's game.

Drew, who hasn't played since Friday against Toronto when he tweaked a hamstring, joined the team for batting practice and participated in a battery of pregame agility drills.

"[It was] change-of-direction stuff," Farrell said. "It's been a good work day so far."

Farrell added, "It was a good step today."

GETTING ACTIVE: In other injury-related news, Farrell provided an update on catcher David Ross, who was transferred to the 60-day disabled list last Tuesday in the aftermath of a concussion.

"He's started to work out, with some exercise on the stationary bike," Farrell said. "He's started to throw; he's started to lift some weights. The sensations that he's felt as a result of the concussion are starting to diminish."