CHICAGO -- Manager John Farrell looked back on the first half of the season, noting a strong offensive output and his club's knack for replacing injured pitchers adequately, while still searching for answers in the bullpen.

"We came out of Spring Training looking to get three first-year pitchers established in the rotation, which is daunting in its own right, and yet probably compounded even further in the AL East," Farrell said. "Through the first two months of the season, they were a strength of this team.

"When you think back to Spring Training, we thought the bullpen would be a strength. That hasn't been the strength that we fully expected. Injury played some of that, inconsistent performance in some other ways."

Through the ups and downs of the Blue Jays season, including a three-game losing streak entering Sunday, Farrell said the spirits of the players in the clubhouse hasn't wavered.

"The one thing that's overriding is the way we've taken the field every day and the attitude and energy we continue to show says a lot about the attitude and character of the players on this team," he said.

Perez headed to DL with left elbow tightness

CHICAGO -- Left-hander Luis Perez left Sunday's game against the White Sox with tightness in his throwing elbow after allowing two hits in the seventh inning.

The reliever is headed to the disabled list.

"We're going to put him on the disabled list immediately, and he'll go to Florida to get further examination," manager John Farrell said after the game.

The Blue Jays haven't made a roster move yet to replace Perez, who will join a long list of Toronto pitchers on the disabled list, including Sergio Santos, Brandon Morrow, Dustin McGowan, Jesse Litsch, Drew Hutchison and Kyle Drabek.

Perez entered the series finale against the White Sox with a 3.07 ERA. After allowing four hits and two runs, his ERA jumped to 3.43, though the Blue Jays held on for the victory.

"Today was a much-needed win, a hard-fought win, and yet a costly one with Luis Perez going down," Farrell said.

Lawrie held out of finale as precaution

CHICAGO -- Brett Lawrie left Saturday's game in the sixth inning with tightness in his lower back and was held out of the starting lineup in Sunday's series finale.

Lawrie said his back felt looser Sunday morning, but he could tell he wasn't 100 percent.

"I think they're just taking precaution, this being the last day before the All-Star break. I think they're maybe just giving me one more day to make sure when I do come back, everything's going to be refreshed."

Manager John Farrell said he didn't feel comfortable risking further damage by letting Lawrie play. He said he anticipates that Lawrie will return after the All-Star break, and the third baseman could use the time off.

"Everything points to that being the case," Farrell said. "Other than the four days he missed following the incident back in Toronto, he's played pretty much every inning. He's due for a day off."

Worth noting

• Lawrie, who's hitting .324 with one home run in his last eight games, was 7-for-21 against the White Sox this season entering Sunday. He said he should be able to pinch-hit if called upon.

• Farrell didn't want to blame injuries on any struggles this season.

"What we encountered with the injuries, it was almost at the same time our offense took off," Farrell said. "To say that we have a different number of wins because of injuries, I can't say that."

• With Saturday's loss, the Blue Jays fell below .500 (42-43) for the second time this season.