Philadelphia Phillies relief pitcher Brad Keller could be asked to take on a larger role in the bullpen over the next few weeks. On Saturday, closer Jhoan Duran (oblique) was placed on the 15-day Injured List. The organization is hopeful it'll be a minimal stay for Duran, but the Phillies will still be without him for the next two weeks. The expectation is that either Keller or Jose Alvarado will take over in the closer role while Duran is down. Given Alvarado's struggles, Keller seems like the favorite to get saves right now. Fantasy managers looking for a source for saves might want to consider adding Keller if he does end up taking over the closer role.

Chicago Cubs relief pitcher Caleb Thielbar was handed the ball in the ninth inning during Saturday's game against the New York Mets. The Cubs are seeking a new closer while Daniel Palencia (oblique) is on the Injured List. Thielbar got the first crack at the closer role and did a nice job on Saturday. The veteran southpaw tossed a clean inning with two strikeouts to earn his first save of the season. Thielbar only has six career saves, but could end up getting a majority of the save chances while Palenica is out. Ben Brown is also an option, but the Cubs likely want to keep him in his multiple-inning role. Thielbar could be worth a look in the short-term for fantasy managers looking for a source of saves.

Philadelphia Phillies relief pitcher Jhoan Duran (oblique) was placed on the 15-day Injured List, retroactive to April 15, on Saturday. The Phillies are hopeful that Duran will be back in 15 days. It's a "very mild" oblique strain, so the team believes he'll only need the minimum of 15 days on the shelf. It's unclear who is going to be the primary closer while Duran is out. It could be a closer-by-committee situation, which is never fun for fantasy managers. At the moment, Brad Keller and Jose Alvarado are the favorites to get the ball in the ninth while Duran is down. Fantasy managers will hopefully only be without Duran for the next two weeks, but the team should continue to update his status as Duran progresses.

Arizona Diamondbacks outfielder Lourdes Gurriel Jr. (knee) has been reinstated from the Injured List on Saturday. Gurriel is set to make his season debut after missing the beginning of the season while recovering from ACL surgery he underwent last September. The assumption was that Gurriel would be eased back into things and serve as the designated hitter. That isn't the case as Gurriel is in left field and batting cleanup against right-hander Max Scherzer on Saturday. The 32-year-old is coming off major knee surgery, so fantasy managers should dampen their expectations. Gurriel should still be able to offer decent value in deeper mixed leagues.