Still looking to make up ground on the first-place Brewers, the Cardinals will go for their fourth straight win on Saturday. They'll try to continue taking advantage of the Marlins, who have dropped six of their last eight, including a 3-2 loss in St. Louis on Friday night.
St. Louis has struggled on offense all year, and manager Mike Matheny said he'll be spreading out playing time more now that Oscar Taveras is back in right field. It seems likely that Allen Craig and Matt Adams will split time. Craig will likely be back in the lineup Saturday when the Cardinals face Marlins rookie lefty Andrew Heaney.
"It's day by day looking at matchups, looking at how guys are feeling, looking at how their bodies are responding, how the schedule plays out," Matheny said of the lineup. "Our job around here is not to make everybody happy. Our job is to win games and maximize guys and their talents. We've got a different group when you bring in a player like Oscar in here and everybody's healthy. It's not easy being that guy that gets time taken away."
Though the Cardinals' arms have been solid this season, their rotation has had some physical issues lately, and after Lance Lynn rebounded from a blister on Friday, Shelby Miller will take the mound Saturday looking for a bounce-back start. He dealt with some back tightness on June 24 and then surrendered six earned runs to the Dodgers in his most recent start on Sunday.
On the Miami side, Heaney, a touted prospect, has shown promise in each of his first three starts. Yet he's been victimized in each outing by a crucial home run.
In each case, the home run came on a grooved fastball. In his last outing, a loss to the A's, Heaney allowed a three-run homer to Nate Freiman with two outs in the sixth inning.
Heaney had gone 5 2/3 scoreless innings against the A's before they strung together four straight two-out hits in the sixth, posting four runs.
"The last one was way better than the first two starts," Heaney said. "That's going to help with my secondary pitches, being able to get some swings and misses. It's just being more consistent with the fastball in the zone and keeping it on the corner. Staying away from fastball mistakes down the middle. The three big mistakes I've given up, that's what they've been -- fastballs down the middle."
Marlins: Dietrich sent to disabled list
On Friday, Miami placed second baseman Derek Dietrich on the 15-day disabled list, retroactive to Tuesday, with a right wrist strain.
Outfielder Jake Marisnick was recalled from Triple-A New Orleans to fill Dietrich's roster spot.
Dietrich last played on Tuesday and went hitless in four at-bats against the Phillies. The left-handed-hitting infielder felt some discomfort taking a practice swing while on deck. He stayed in the game, but on Wednesday in the batting cage, the wrist bothered him enough to get an MRI exam, which revealed the strain.
"While in the on-deck circle taking a practice swing, he felt something," manager Mike Redmond said. "The next day, he said swinging in the cage, he took quite a few swings and it blew up on him. He got it checked out. Had an MRI, and we put him on the DL."
For the season, Dietrich is hitting .228 with a .326 on-base percentage, with six doubles, two triples, five home runs and 17 RBIs. He's had his struggles defensively, committing 10 errors at second base, and one error at third.
Cardinals: Craig raring to go
Craig is hitless in his last seven at-bats, and Matheny said the slugger is itching to get back in the lineup after sitting out Thursday and Friday.
"A day like today, especially after getting a day yesterday, he wants in there. He should want in there," Matheny said Friday. "But sometimes taking an extra day could be that open door to going and doing some extra work you wouldn't normally otherwise and have something really click. To me, he's really close. He's got a good idea what he wants to work on to get him there. He's got the ability to carry us here for a while once he gets going."
Craig is batting .252/.301/.362 this season after posting a line of .315/.373/.457 in 2013.
• This will be Miller's first career start against Miami.
• Heaney, 23, attended Oklahoma State, and he lives about a seven-hour drive from St. Louis. Growing up, he traveled a couple of times with his father to Busch Stadium to see the Cardinals. About 15 family members will be on hand Saturday to watch him pitch.
Caitlin Swieca is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.