CHICAGO -- It didn't take long for the Colorado Rockies to see what they needed to see from first baseman Justin Morneau and left-hander Boone Logan on a minor league rehab assignment.

Both played one rehab game, Monday night with Triple-A Colorado, before both were activated from the 15-day disabled list Tuesday at Wrigley Field prior to the Rockies' 4-3, 16-inning loss to the Chicago Cubs. Morneau hit fifth and went 1-for-4 with a two-run double. Logan threw a scoreless inning of relief.

"With a couple veterans like Boone and (Morneau), we just needed to see them go down there and show that the speed of the game wasn't too much for them," Rockies manager Walt Weiss said of the rehab outing. "They needed to go down and be sharp, then come back up and help us."

Morneau, who went on the DL retroactive to July 14 due to a neck strain, went 2-for-4 for the Sky Sox on Monday. During his DL stint, Morneau had an MRI exam on his neck, and the results were good news, showing that it actually improved from an earlier MRI done in spring training.

"I think the MRI gave him some peace of mind, and we're always in a hurry to get (Morneau) back in the mix," Weiss said. "He went down there, got four at-bats, a couple hits, and that was good enough."

Boone, who was out with a case of diverticulitis, pitched a scoreless inning of relief for Colorado Springs on Monday, striking out one.

"He's had a tough year because he's been on the DL a few different times," Weiss said. "He was really good early. We saw some electric stuff early, so the silver lining, I guess, is that his arm is in good shape. He hasn't thrown a lot of innings, so his arm is real healthy, and we could use him."

That is especially true now with the Colorado bullpen featuring seven, not eight, options. The Rockies optioned right-handed relievers Brooks Brown and Chad Bettis to Colorado Springs in order to clear roster space for Morneau and Logan.

"We've been eight pitchers in the bullpen for a long time, and this is the first time we've gone to seven," Weiss said, "so, we'll have to deal with that."

After all seven appeared Tuesday, Weiss turned to starter Tyler Matzek, who ended up as the losing pitcher.

Colorado also optioned rookie first baseman Ben Paulsen to Triple-A and brought up rookie Cristhian Adames, an extra middle infielder who can fill in while shortstop Josh Rutledge battles an upper-respiratory infection.