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8/13/2014 6:30 P.M. ET

Alvarez's return puts crowded rotation in flux

Marlins not planning on going with six-man staff; off-days next week a factor

MIAMI -- The Marlins are set to reinstate Henderson Alvarez from the disabled list on Saturday to face the D-backs. After that, the rotation is in a state of flux.

With scheduled days off on Monday and Thursday (Aug. 21) next week, manager Mike Redmond and pitching coach Chuck Hernandez are in the process of adjusting the rotation.

For now, all that is set is Brad Penny will start the series opener with Arizona on Thursday, followed by Brad Hand on Friday and Alvarez on Saturday.

Jarred Cosart could fall in line to start Sunday in the finale of the four-game series with the D-backs. But he has not officially been announced.

Once Alvarez comes off the DL, the team will have to make a decision, because it isn't planning on going with six starters.

Alvarez, on the DL retroactive to July 30 with right shoulder inflammation, threw a bullpen session on Wednesday.

"We've talked about getting guys an extra day, and I think it sort of sets up that way, where we can get each guy one extra day," Redmond said.

Capps could return to Marlins in September

MIAMI -- A power arm could be joining the Marlins' bullpen in September.

Carter Capps, who has blazed 100-mph fastballs this season, could be weeks away from coming off the disabled list.

Capps last pitched on May 25, and the right-hander has been on the DL since May 27 with an elbow sprain. He's currently working out at the team's complex in Jupiter, Fla., where he is throwing.

The way the schedule is worked out, Capps could be facing hitters soon and be ready to be reinstated around Sept. 1.

"I think that's kind of when we anticipate he will be ready to go, either right before or right around Sept. 1," Miami manager Mike Redmond said.

Capps received a scare in late May, and he was examined by noted surgeon Dr. James Andrews, who indicated the reliever did not need surgery.

In nine appearances with the Marlins, the hard-throwing right-hander has struck out 15 and walked three in 12 innings.

Koehler talks 'Sharknado 2' cameo

MIAMI -- Shark Week is not lost on Marlins right-hander Tom Koehler.

Little did Koehler realize when he gave up a home run to former Mets outfielder Chris Young at Citi Field on April 27, that the footage would be part of a made for TV movie.

Indeed it is. Koehler is in "Sharknado 2: The Second One." The movie stars Ian Ziering and Tara Reid.

Koehler wasn't even aware he was in the movie until it aired, and he received a text message from a teammate.

"Actually, it was Dan Jennings who sent me the text," Koehler said. "I was sitting home, watching something totally unrelated on television that night. I got a text that was like, 'Hey, you just gave up a home run in Sharknado.' Then all of a sudden, my Twitter feed was going [crazy]."

As expected, the responses on Twitter were snarky.

"It was like, 'I hope you pitch better than you did in Sharknado,'" Koehler said. "I did end up seeing the clip."

Athletes have historically been part of movies. Koehler never thought his movie debut would be a cult-following shark movie.

"I thought if I was ever going to be in a movie, it wasn't necessarily going to be in Sharknado: The Second One," the right-hander said. "It was one of those movies where I was like, 'I can't watch this. I can't watch it.' Then, two hours later, you're like, 'They just killed a shark with a chainsaw!'"

Worth noting

• Jennings, on the seven-day concussion disabled list, is making progress. The lefty, who was struck on the side of the head by a line drive on Aug. 7 at Pittsburgh, is symptom-free. He played some catch, but there is no specific timetable for when he will be ready to return.

• Derek Dietrich, on the disabled list since July 4 with a left wrist strain, is in Jupiter swinging the bat. September would be the earliest he could return.

• General manager Dan Jennings participated in the ALS Ice Bucket challenge on Wednesday, getting doused by Jeff Conine while the Marlins took batting practice. The challenge is to raise awareness toward combating ALS.

Joe Frisaro is a reporter for MLB.com. He writes a blog, called The Fish Pond. Follow him on Twitter @JoeFrisaro. This story was not subject to the approval of Major League Baseball or its clubs.