UPDATE: Astros September callups includes De Leon, Stassi, Tropeano, and Villar

The calendar has turned to the final month of the regular season, and the Triple-A Oklahoma City RedHawks were eliminated from playoff contention on Sunday. That can mean only one thing, September callups. Major league baseball teams are allowed to have their entire 40-man roster at their disposal for the final month of the season. Sources have told the Houston Chronicle and reporter Evan Drellich that the Astros have begun their callups. The first crop of callups reportedly includes righthanded pitcher Jorge De Leon, catcher Max Stassi, righthanded pitcher Nick Tropeano, and shortstop Jonathan Villar.

Jorge De Leon, a righthanded pitcher began the season with Double-A Corpus Christi - moving up to Triple-A after 20.2 innings with 3.92 ERA. De Leon has as 2.63 ERA in 48 innings with RedHawks - also posting .333 BABIP*. This will be De Leon's second stent with the Astros as a September Callup, he pitched 10 innings with a 5.40 ERA in 2013.

Max Stassi's returning to the majors will be triumph in itself, Stassi was hit in the face by a 96-mph fastball from Rangers reliever Tanner Scheppers in his second career major league game. One of the many pieces in Jed Lowrie trade, Stassi spent the entire season in Triple-A - batting .247 with 41 extra-base hits and 45 RBIs. MLB.com listed Stassi as the Astros' nineteenth-best propsect currently in the system.

Righthanded pitcher Nick Tropeano makes his first trip to the big leagues. Tropeano is thirteenth-best prospect as ranked by MLB.com. The righty has rebounded from forearm soreness earlier this season to post a 3.03 ERA in 124.2 innings in Triple-A Oklahoma City - this he has a .248 BABIP and 3.81 FIP.

The Astros Opening Day shortstop Jonathan Villar returns after being sent down for poor offensive output and lackadaisical defensive play. In Triple-A, he batted .258 (49-190) with eight extra-base hits and 24 stolen bases.

One final note that complicates things, neither De Leon and Tropeano are on the Astros 40-man roster. The Astros must have corresponding moves to get them on the 40-man. Stay tuned to TCB for updates.

UPDATES

Additionally, the team has recalled outfielder L.J. Hoes to the major league club.  Hoes has been with the club on 2 other occasions this season, batting .175/.233/.292 in those games.

To make room for De Leon and Tropeano on the 40-man roster, right-handed pitchers David Martinez and Paul Clemens were designated for assignment.

Also available for tonight's game is righthanded pitcher (and recent waiver acquisition) Samuel Deduno.  Deduno was claimed from the Twins on Saturday, and will provide an extra arm in the bullpen.

Not a September callup, but in other roster news, Darin Downs is no longer on the 15-day DL, and rejoins the club after his Minor League rehab assignment.

*Stats courtesy of Fangraphs