Rosscup was optioned to Triple-A Iowa on Wednesday, Patrick Mooney of CSN Chicago reports.

Rosscup split 2014 between the minors and majors, getting mixed results. In 29 games with Triple-A Iowas, the south paw posted a 2.10 ERA and 1.10 WHIP with 38 strikeouts in 30 innings. However, his major league success was minimal, finishing with a 9.45 ERA and 1.95 WHIP with 21 strikeouts in 13.1 innings. While he'll begin 2015 back in the minors, Rosscup remains one of the top candidates to grab a spot in the bullpen should someone suffer an injury.

Rosscup pitched a scoreless inning Saturday and is in contention for one of the remaining spots in the bullpen, Carrie Muskat of MLB.com reports.

The Cubs are expected to have seven pitchers in their bullpen, and with Hector Rondon, Pedro Strop, Neil Ramirez, Jason Motte, and either Travis Wood or Edwin Jackson already locked in, there are probably only two spots up for grabs. Rosscup is battling Drake Britton and Phil Coke for a spot from the left side. Coke probably has the inside track at this time, but he's not currently on the 40-man roster, so Rosscup, who has struck out nine and walked three in eight innings this spring, still has a good shot.

Rosscup was recalled from Triple-A Iowa on Thursday, Gordon Wittenmyer of the Chicago Sun-Times reports.

Rosscup will be up to replace Edwin Jackson (lat strain) on the active roster, but the team has yet to announce replacement for Jackson in the rotation. While Rosscup has posted a 2.10 ERA and 11.4 K/9 in 29 appearances with Iowa, he's struggled in seven outings with the big club (7.50 ERA) and likely won't be entrusted with high-leverage innings.

Cubs optioned LHP Zach Rosscup to Triple-A Iowa.

The 26-year-old southpaw posted a 7.50 ERA and 1.67 WHIP in his six innings of work with the Cubs while registering a 10/4 K/BB ratio. He'll likely get another opportunity with the team at some point during the second half of the season.

Cubs recalled LHP Zach Rosscup from Triple-A Iowa.

Rosscup was unscored upon in his four relief frames for the Cubs earlier this season. He'll be used in the middle innings.

Cubs activated LHP Zach Rosscup from the 15-day disabled list and optioned him to Triple-A Iowa.

Rosscup has been sidelined since May 14 due to soreness in his left shoulder. He'll continue to function as organizational bullpen depth in the minor leagues, and should get another chance with the Cubs at some point this season.

Zac Rosscup was expected to begin a rehab assignment with Triple-A Iowa on Saturday.

Rosscup has been on the disabled list since May 14 due to left shoulder soreness. He'll likely only need a few outings before being ready to return to the Cubs. He hasn't allowed a run in four innings of relief this season.

An MRI on Zach Rosscup's left shoulder revealed only inflammation.

It's not clear how long Rosscup will be sidelined, but the fact that he doesn't have any structural damage is obviously good news. Rosscup was unscored upon in four appearances before going on the DL earlier this week.

Cubs placed LHP Zac Rosscup on the 15-day disabled list, retroactive to May 10, with left shoulder soreness.

It's unfortunate timing for the left-hander, as he hasn't allowed a run in four innings of work since being recalled. Jose Veras was activated to take his roster spot.

Cubs recalled LHP Zach Rosscup from Triple-A Iowa.

Rosscup has made two scoreless appearances in two different stays with the big-league club this season. The left-hander deserves a lengthier look this time around.

Cubs optioned LHP Zach Rosscup to Triple-A Iowa.

The 25-year-old southpaw appeared in two games during his brief time with the big league club, working 2 2/3 shutout innings while allowing just one walk and striking out a pair. He's likely to get another chance with the Cubs very soon.

Cubs recalled LHP Zach Rosscup from Triple-A Iowa.

Rosscup tossed 1 2/3 perfect innings in a doubleheader earlier this season for the Cubs. The left-hander will serve as middle relief depth in the Chicago 'pen.

Cubs optioned LHP Zach Rosscup to Triple-A Iowa.

Rosscup was the 26th man for Wednesday's doubleheader and tossed 1 2/3 perfect innings in an appearance. He should get another shot later this summer.

Cubs recalled LHP Zach Rosscup from Triple-A Iowa.

Rosscup will serve as the Cubs' 26th man for the second half of Wednesday's doubleheader against the Yankees. He'll function as left-handed relief depth.