Roster expansion: What to know about Mets' Jamie Callahan and Jacob Rhame

By Abbey Mastracco | NJ Advance Media for NJ.com

Don't Edit

Joel Auerbach | Getty Images

Don't Edit

The Mets finally got a look at two of the pitchers they acquired in trades this year. Right-handers Jamie Callahan and Jacob Rhame made their MLB debuts on Saturday in the first game of a doubleheader against the Astros.

The two were brought up when rosters expanded on September 1, and so far they've been the only ones. Mets assistant general manager John Ricco said there will be more after the Pacific Coast League season wraps up and after the club's Double-A affiliate, the Binghamton Rumble Ponies, are out of the Eastern League playoffs.

Here's a look at how Callahan and Rhame fared, and who else you might see in September.

Don't Edit

Jamie Callahan

Don't Edit

Callahan was one of the pitchers the Mets received from the Boston Red Sox in exchange for closer Addison Reed. Callahan threw some gas, reaching 97 on the gun, but it wasn't exactly a stellar debut. He allowed two earned runs over 2/3 of an inning. However, Callahan was still encouraged by his first big league outing and looks forward to working to his strengths at the next level.

"I pound the zone early with my fastball and the put guys away with my splitter and my slider down in the zone," Callahan said. "Just keeping that down and being able to repeat that over and over."

Don't Edit
Don't Edit

Jacob Rhame

Don't Edit

Twitter had a lot of fun with his last name and his glasses, and he had a lot of fun throwing 1 1/3 scoreless innings.

"I've been wanting that since I was a kid, so to actually go out there, settle down and throw strikes was a lot of fun," Rhame said.

Don't Edit

Who else could come up?

The Mets were in need of another outfielder until they came to terms with Nori Aoki. They may still choose to call one up, but with Wilmer Flores injured another infielder might be necessary. The Mets will also bring up another catcher and have two to choose from.

Don't Edit

Noah K. Murray | USA TODAY Sports

RHP Robert Gsellman

Don't Edit

The right-hander hasn't quite been able to figure out his issues any level this season. He was roughed up a few times during Double-A rehab starts, he was roughed up all season in the big leagues and was recently sent back to Triple-A where it was pretty much status quo. He gave up seven runs (five earned) on 10 hits, walked three and struck out three.

Once a player is sent back to the minor leagues, he has to wait 10 days before coming back up unless there is an injury that forces someone to the disabled list. Gsellman will likely be back up as soon as the PCL season ends.

Don't Edit
Don't Edit

Brad Penner | USA TODAY Sports

RHP Kevin McGowan

Don't Edit

The bullpen has plenty of arms right now, but McGowan's season has warranted a September call-up.

Don't Edit

Lynne Sladky | AP Photo

C Tomas Nido

Don't Edit

The Double-A catcher turned heads at the Futures Game and John Ricco said he's been discussed as a possibility. Regardless, he's on his way to the Arizona Fall League after the season.

Don't Edit

What to know about Nori Aoki

Don't Edit
Don't Edit

Jose Mendez | EPA

C Xorge Carrillo

Don't Edit

The other catcher the Mets could bring up is Carrillo, who put together a nice season at the plate in Las Vegas, though the numbers may be inflated due to the PCL ballparks. The 28-year-old has never been in the big leagues, and with the Rumble Ponies in the playoffs, this could be his chance.

Don't Edit

Chung Sung-Jun | Getty Images

UTIL Cody Decker

Don't Edit

Decker has been sidelined with an oblique strain but is good to go for the last few PCL games. He can play nearly every position but has been working out as a backup catcher this season, splitting time between Double-A and Triple-A. He's been lauded by coaches in the organization for his work ethic and in the last month of a dismal season, he may provide some comic relief.

Don't Edit

WATCH: A.J. Hinch addresses crowd and thanks Mets for service following Hurricane Harvey

Don't Edit
Don't Edit

Abbey Mastracco may be reached at amastracco@njadvancemedia.com. Follow her on Twitter @abbeymastracco. Find NJ.com on Facebook.

Don't Edit