The Cubs tabbed Casey Coleman to replace Dempster for Tuesday's game, while the Pirates -- who made a couple trades of their own on Tuesday -- will start A.J. Burnett. Pittsburgh acquired veteran reliever Chad Qualls and first baseman Gaby Sanchez in the hours before Tuesday's deadline.
Dempster had been one of the most heavily sought after players on the open market, and the Cubs sent him to the Rangers in exchange for prospects Christian Villanueva and Kyle Hendricks. Chicago had also considered sending Dempster to the Braves and Dodgers before settling on Texas.
Pittsburgh sent Casey McGehee to the Yankees in the Qualls deal, and it acquired Sanchez from the Marlins in exchange for well travelled Minor League outfielder Gorkys Hernandez. Hernandez, who has played just 25 games in the Majors, has already been a part of three separate trades.
Burnett will look to get the Pirates back on track after Chicago scored a season-high 14 runs on Monday, including a nine-run fifth inning. Burnett, who has a 2.86 ERA in his last four starts, will look for win No. 13 on the season, which would match the second-highest total of his career.
"I'm not paying attention to that," Burnett said. "Only thing that matters is how the team is going."
Burnett has gone at least seven innings in eight of his 18 starts this season. Last year, he did that nine out of 33 outings. Burnett has faced the Cubs once this season, throwing 5 1/3 scoreless innings in Pittsburgh for his third win of the year.
Pirates: Cruz throws, closer to making return
Pirates reliever Juan Cruz threw from a mound on Sunday for the first time since heading to the disabled list on July 18 with inflammation in his right shoulder. Cruz threw about 20 fastballs to a standing catcher, and is at least two weeks away from returning to the Pirates' bullpen.
Cruz played long toss on Monday and is scheduled for a regular bullpen session on Tuesday. He expects to throw 25-30 pitches using all of his pitches.
Cruz is 1-1 with a 2.61 ERA in 37 appearances this season.
Andrew McCutchen has reached base safely in 38 straight games against the Cubs, and in 44 of his 47 career games against Chicago. He is batting .323 (52-for-161) with seven doubles, three triples, six homers, 26 RBIs and 29 runs scored in those 47 games.
Cubs hitters are batting .217 lifetime against Burnett. David DeJesus has the most at-bats against Burnett, and he is 4-for-19 with a double and three strikeouts.
Darwin Barney went 3-for-5 and was a double shy of the cycle on Monday. His four RBIs were a season high.