Rauch was designated for assignment May 17 after allowing two runs in an inning, jacking his ERA to 7.56 in 15 appearances.
"We gave him a lot of opportunities and it just didn't work out," manager Mike Redmond said of Rauch, who signed a $1 million contract. "We were just at a point, at a time, where it was time to move on."
Miami, 2-1 winners over Arizona on Sunday, called up left-hander Duane Below from Triple-A New Orleans to take Rauch's roster spot. Below has started, too, so he will be used out of the bullpen to throw multiple innings -- and give the Marlins' overworked relief corps a break.
"We need, right now, guys that can throw multiple innings," Redmond said. "We were just at a point in time where it was time to move on and get a guy who could throw some more innings."
Mike Dunn is Miami's other lefty, but he is used to face left-handed hitters and to close games.
"It's nice to have another lefty in there, a guy that can throw multiple innings," Redmond said.
The Marlins claimed Below off waivers from Detroit on April 25. He made 27 appearances for the Tigers, including 26 in relief.
NEXT: Phillies (Cole Hamels, 1-6, 4.61) at Marlins (Alex Sanabia, 2-6, 5.00)
RHP Alex Sanabia will make his ninth start of the season, opening a three-game series against the visiting Phillies. Sanabia has lost five straight decisions and is just 1-3 with a 5.70 ERA at Marlins Park. When he is at his best, though, he is getting ground balls. He is tied for the National League lead with 10 ground-ball double plays.
C Jeff Mathis, getting a rare start Sunday, had a great at-bat in the third inning against Wade Miley. After falling behind 1-2 in the count, Mathis hit a curve ball that was low and away and stroked it over the head over Gerardo Parra in center field for a one-out double.
LHP Mike Dunn is one of just five big-league relievers who have yet to allow a run at home this season, minimum of 10 appearances. He has allowed just seven hits in those 10 innings. On Sunday, he earned his second career save. The other one came last July vs. Washington.
RHP Ricky Nolasco beat Arizona on Sunday, pitching eight-plus innings, striking out 10. He threw 110 pitches and allowed just four singles, one double, one walk and one run. His 10 strikeouts were the most by Nolasco since he punched out 11 Nationals' batters May 6, 2011.
RHP Ryan Webb had his 10 1/3 hitless streak—the longest in the majors this season—snapped Saturday night. But the middle reliever extended his scoreless streak to 16 2/3 innings, a career best. Webb entered Sunday tie with Jonathan Papelbon for the longest active scoreless streak by a big-league reliever.
RF Marcell Ozuna beat the Diamondbacks with a two-run double in a 2-1 win Sunday. Ozuna, who made his big-league debut April 30, now has four game-winning RBIs for the Marlins. No other rookie in this year's big-league class of newcomers has more than one.
RF Giancarlo Stanton (strained right hamstring) has been has been "playing catch and hitting off the tee," according to manager Mike Redmond. "Maybe next week he'll midweek start jogging and incorporating some movement into his routine." Stanton said he expects to come back before the All Star break, possibly even sometime next month. He has been on the disabled list since April 30, and the typical recovery time for a hamstring strain is four to six weeks, which in his case would be mid-June.
"Tony Perez came out before the game and touched all the bats. So I felt good about that, and we got two runs."—Manager Mike Redmond, in reference to the Hall of Famer who now works in the Marlins' front office.
RF Giancarlo Stanton (strained right hamstring) went on the 15-day disabled list April 30. He did some light stretching and throwing on the field before the May 15 game. He's still likely out until June as he is yet to begin running.
1B/LF Logan Morrison (surgery to repair a torn right patella tendon in September 2012) on May 14 played first base for the first time this year in an extended spring game. He could begin a 20-day rehab stint the week of May 20. He's expected to play nine innings in his next extended spring training game. He went on the 60-day disabled list March 31. As of April 7, Morrison was already participating in batting practice and taking grounders. He began running April 12 after being previously restricted to anti-gravity treadmill running.
INF Chris Valaika (broken left wrist) is expected to miss four-to-six weeks after fracturing his wrist May 6. He was placed on the 15-day disabled list May 8. He had surgery where two pins were inserted into his broken left wrist on May 10.
2B Donovan Solano (strained left intercostal muscle) went on the 15-day disabled list retroactive to May 4.
1B Joe Mahoney (strained right hamstring) went on the 15-day disabled list retroactive to April 28.
RHP Henderson Alvarez (right shoulder inflammation) went on the 15-day disabled list retroactive to March 27, and he was transferred to the 60-day DL on May 7. He threw bullpen sessions April 12 and 17 and threw 30 pitches in a batting-practice session April 23 in Jupiter, Fla. He threw 45 pitches on April 28 and was shut down after feeling soreness. He resumed playing catch in early May.
1B Casey Kotchman (left hamstring strain) went on the 15-day disabled list retroactive to April 4. He was transferred to the 60-day DL on May 8.
RHP Nathan Eovaldi (right shoulder inflammation) went on the 15-day disabled list retroactive to March 24, and he was transferred to the 60-day DL on April 18.
RHP Jose Ceda (Tommy John surgery in April 2012) went on the 60-day disabled list March 31 after suffering a setback in spring training.
OF Alfredo Silverio (Tommy John surgery in May 2012) went on the 60-day disabled list March 31.
RHP Ricky Nolasco
RHP Kevin Slowey
LHP Wade LeBlanc
RHP Alex Sanabia
RHP Jose Fernandez
RHP Steve Cishek (closer)
RHP Ryan Webb
LHP Mike Dunn
RHP Chad Qualls
RHP Tom Koehler
LHP Duane Below
1B Greg Dobbs
2B Derek Dietrich
SS Adeiny Hechavarria
3B Placido Polanco
INF Nick Green
LF Juan Pierre
CF Justin Ruggiano
RF Marcell Ozuna
OF Matt Diaz
OF Chris Coghlan