ATLANTA -- With rosters expanding to 40 players Saturday, the Braves' plan to call up four players, manager Fredi Gonzalez said. Another group of callups will join the Braves after the Minor League season is completed, which for Triple-A Gwinnett will be Sunday.

First baseman Lyle Overbay, whom the Braves signed to a Minor League contract Aug. 20, will be among the first group of callups. He is 6-for-22 with three doubles and six walks in seven games for Gwinnett.

Wren said Overbay "looks like the same guy" as he has throughout his 12-year Major League career.

"He's done well," Wren said. "Good professional at-bats, hitting balls in gaps, all the things he normally does."

Right-hander Peter Moylan will also be in the first group. After undergoing shoulder surgery last October, Moylan signed a Minor League contract and has been working his way back. He pitched in 12 games at Triple-A Gwinnett in August, striking out 13 in 12 2/3 innings.

Moylan tweeted Friday night, "I can't thank the @braves enough for yet another opportunity to compete at the highest level. So excited for tomorrow. #BravesCountry"

Also expected to join the Braves on Saturday will be utility player Jeff Baker, who was acquired Friday night in a trade with the Tigers. Midnight on Friday was the deadline to add players from outside the organization who will be eligible for the postseason.

Simmons cleared to resume baseball activities

ATLANTA -- Shortstop Andrelton Simmons was cleared for all baseball activities beginning Saturday by Dr. Gary Lourie, the Braves announced Friday night. Simmons has been on the 15-day disabled list since the All-Star break with a broken right pinkie.

General manager Frank Wren said the club hasn't established a firm schedule for Simmons' rehab and won't until Lourie officially clears him to start playing games.

Simmons will be reexamined by Lourie on Sunday. If that goes well, he would likely start his rehab assignment Tuesday. Where he would go has yet to be determined. With the Minor League regular season ending this weekend, Simmons will have to join one of the Braves' affiliates that is in the playoffs, likely either low Class A Rome or high Class A Lynchburg.

During the Braves' last road trip, Simmons worked out with Triple-A Gwinnett and fielded ground balls before Friday's 8-5 loss to the Phillies at Turner Field.

Simmons said he feels good and is just waiting to get cleared to play in games.

He has been sidelined since the All-Star break. Before the injury, Simmons was hitting .296 with a .452 slugging percentage in 33 games since making his Major League debut June 2.

Close to returning, shortstop Wilson released

ATLANTA -- The Braves announced Friday they released veteran shortstop Jack Wilson. He has been on the 15-day disabled list since July 15 with a dislocated pinkie finger, but was close to returning.

Wilson played in 40 games this season for Atlanta, serving as the backup shortstop. He hit .169 with a .189 on-base percentage.

General manager Frank Wren said as the front office evaluated the team going into September, it didn't see how Wilson fit in with the team.

"As we talked, we didn't see a definitive role," Wren said. "It's hard in September when you don't see that role."

Paul Janish has filled in capably as the starting shortstop for the last six weeks, replacing injured rookie Andrelton Simmons, who is expected to return in mid-September. Martin Prado and Tyler Pastornicky, who started at shortstop on Opening Day, are options as well.

Manager Fredi Gonzalez said Wilson took the news of his release well.

"He was fine," Gonzalez said. "He's a pro."

Wilson's release comes on the one-year anniversary of the trade with the Mariners to acquire him last year. In 57 games spread out over two seasons, Wilson hit .188 while providing backup at shortstop, third base and second base.