CHC@BOS: Lake breaks his bat over his leg

BOSTON -- Junior Lake snapped a bat over his knee after striking out in the fourth inning, the second of four times he would whiff in the Cubs' 2-0 win Monday against the Red Sox. Lake is now 0-for-13 in his last four games, but manager Rick Renteria isn't worried.

"We just have to make sure Junior gets the ball up in the zone a little bit," Renteria said. "[On Monday], he had four strikeouts and three of the four were balls down in the zone. It's just a matter of us making sure we stay positive with him and share with him what we're seeing and try to get feedback from him on what he sees."

There has been no talk about Lake going to Triple-A Iowa to get regular at-bats, Renteria said.

"We'll continue to give him opportunities to play," Renteria said. "We'll just continue to do what we've been doing the whole season and picking and choosing and working and trying to make adjustments."

Lake has had some peaks and valleys. He batted .273 in 26 games in May and hit .190 in 23 games in June.

"Obviously, for him it's not been the track that he's wanted," Renteria said of Lake. "He's shown signs of being able to do things and he's had signs where he's had a little valley. Right now, he's probably in that little valley and we have to help him get back out of it."

Was that a red flag when Lake snapped the bat over his knee?

"Not for me," Renteria said.

Coghlan getting familiar playing Green Monster

CHC@BOS: Coghlan throws out Pierzynski at second

BOSTON -- Chris Coghlan made sure he got comfortable with the Green Monster at Fenway Park.

The Cubs' outfielder played his fifth career game at Fenway on Tuesday, and second straight in left field, right in front of the formidable 37-foot high left-field wall.

"People have different tactics, whether to play shallow or to play right against the wall," Coghlan said. "I like to play a little more shallow, because pretty much everything over your head will be a double or homer. That's basically it and you just have to be prepared for any angle off the wall."

Coghlan made sure to spend as much time in front of the wall in batting practice as possible. On Monday, Coghlan wasn't tested at all as pitcher Jake Arrieta combined with two others to hold the Red Sox to two hits in a 2-0 Chicago victory.

"You have to get used to being closer to the shortstop than you normally are," Coghlan said of Fenway. "Once you're OK with that, then you realize you can only run back 10, 15 yards, and outside of that, it's off the wall."

Coghlan said dealing with left field in Fenway is similar to left field at Minute Maid Park in Houston.

"Anything high off the wall, you just play off the wall," he said. "The only time it really gets difficult is if it hits where the numbers are lower on the wall, and the ball can cut and go anywhere. There's some areas where the ball will kick right or left. You do your homework before, you should be all right."

Extra bases

• One day after nearly no-hitting the Red Sox, Jake Arrieta was doing his cardio workout at Fenway Park in preparation for his next start Sunday against the Nationals. The Cubs have an off-day Thursday, so all of the starters will get an extra day of rest. Arrieta threw a career-high 120 pitches Monday.

"He should be OK," Renteria said.