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7/23/2014 6:40 P.M. ET

Injured Gibson aims to return to rotation Saturday

MINNEAPOLIS -- Right-hander Kyle Gibson, who was scratched from his scheduled start on Wednesday with back stiffness, said his back is feeling better, and the Twins are hopeful he'll rejoin the rotation on Saturday.

The Twins have an open spot in the rotation on Saturday after left-hander Kris Johnson was optioned to Triple-A Rochester after his start on Monday. Gibson first felt stiffness in his back while throwing a bullpen session on Monday, and he thought it would loosen up by Wednesday, but it remained stiff enough that he had to be scratched in favor of right-hander Anthony Swarzak.

"It's still pretty tight," Gibson said. "I tried to be as optimistic as possible on Monday after it tightened up, but it never loosened up. As the day went on, it got worse and worse.

"And on Tuesday, I got treatment and tried to be optimistic about being ready to go today. I've been getting treatment on it 24/7, but it's nowhere near ready to compete and be comfortable on the mound."

Gibson said he's never had a similar injury, but he remains hopeful it'll calm down over the next few days with more treatment. Twins manager Ron Gardenhire said the tentative plan is for him to start Saturday against the White Sox. If not, the Twins will have to call up a starter.

"We're hoping Saturday," Gardenhire said. "That's our plan for him to start Saturday. But that's only if it works out. We'll go day to day with him until that day comes up. Friday will be a big day for us for him to run around a little bit and tell us."

Twins designate Guerrier, call up reliever Pressly

MINNEAPOLIS -- The Twins designated reliever Matt Guerrier for assignment after Wednesday's 3-1 win over the Indians, and they will recall reliever Ryan Pressly from Triple-A Rochester to take his place on the roster.

Guerrier, who turns 36 on Aug. 2, posted a 3.86 ERA with 12 strikeouts and 10 walks in 28 innings this year. His last appearance came Tuesday, and it was a rough one, as he gave up four runs on four hits and two walks in one inning.

Guerrier rejoined the club on a Minor League deal this year after spending seven seasons with the Twins from 2004-11. The right-hander was coming off surgery to fix the flexor mass in his right elbow, and he began the year at Rochester before having his contract purchased on May 7.

In his eight seasons in Minnesota, Guerrier had a 3.40 ERA with 322 strikeouts and 157 walks in 500 innings.

"It's a very tough moment here," Twins manager Ron Gardenhire said. "Matty Guerrier means a lot to us in this organization and this clubhouse. He's a first-class guy. So it's a real tough moment here."

Pressly, meanwhile, has been solid at Triple-A with a 2.98 ERA and 63 strikeouts against 21 walks in 60 1/3 innings. The 25-year-old spent all of last season with the Twins as a Rule 5 Draft pick, and he fared well as a rookie with a 3.87 ERA in 76 2/3 innings.

Twins awarded No. 4 Draft pick in 2015 Round B

MINNEAPOLIS -- The Twins received an extra pick in next year's First-Year Player Draft as a result of the third annual Competitive Balance Lottery, Major League Baseball announced Wednesday.

The Twins were awarded the fourth selection in Round B, which comes after the second round of next year's Draft. It's the first time Minnesota has been awarded a pick in the Competitive Balance Lottery.

The lottery gives teams with the lowest revenues and in the smallest markets the chance to obtain additional picks in the Draft. The 10 teams with the lowest revenues and the 10 clubs in the smallest markets were entered into a lottery for the six selections immediately following the first round of the Draft.

The teams that did not receive one of the six selections after the first round and those who receive revenue sharing funds were entered into a second lottery for the six picks immediately following the second round of the Draft. A club's odds of winning the lottery were based on its prior season's winning percentage compared to other eligible clubs in that lottery round.

The Twins, along with the Mariners, were only eligible for Round B, as they both receive revenue sharing funds, but don't rank in the bottom 10 in market size or revenue. The Pirates, Rays and Royals were not selected in either round.

Competitive balance picks are also the only picks that can be traded before next year's Draft.

Nolasco throws as he works through elbow strain

MINNEAPOLIS -- Right-hander Ricky Nolasco has been playing catch from 150 feet, and he is scheduled to throw a bullpen session on Sunday, Twins general manager Terry Ryan said Wednesday.

Nolasco, who is on the 15-day disabled list with a right elbow strain, hasn't pitched since July 6. There's still no timetable for his return, as the Twins are still deciding whether he'll need a rehab assignment before he returns.

"I think we're working toward Sunday," Ryan said. "He'll throw a bullpen, which is a good sign. It means he's back on the mound."

Nolasco, 31, has dealt with the elbow injury off and on throughout the season. He's struggled this year, posting a 5.90 ERA in 18 starts in his first season with the Twins after joining the club on a four-year, $49 million deal in the offseason.

Rhett Bollinger is a reporter for MLB.com. Read his blog, Bollinger Beat, and follow him on Twitter @RhettBollinger. This story was not subject to the approval of Major League Baseball or its clubs.