March 11, 2016 - Memphis Grizzlies Jordan Adams, Chris Andersen, Mike Conley and Zach Randolph, all injured, watch the team take on the New Orleans Pelicans at FedExForum. (Nikki Boertman/The Commercial Appeal)

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By Ronald Tillery of The Commercial Appeal

ATLANTA – The Grizzlies were granted two injury exceptions by the NBA and used them Saturday to sign guard Ray McCallum and center Alex Stepheson to 10-day contracts.

Stepheson, 28, mostly recently played on a 10-day deal for the Los Angeles Clippers. He played 31 games with the Iowa Energy this season, averaging 16 points and 14 rebounds in 34 minutes a game for the Grizzlies' NBA Development League affiliate.

McCallum, 23, appeared in 31 games for the San Antonio Spurs this season, averaging 2.2 points and 1.1 assists. The 6-3 guard was the 36th overall pick during the 2013 NBA draft by the Sacramento Kings.

The Spurs waived McCallum Feb. 29 to create room for the signing of Andre Miller. McCallum would be eligible for the playoffs because his release happened before March 1.

The Griz now have three players with 10-day contracts after signing D-League point guard Briante Weber on Friday. Weber started and logged 40 minutes in an overtime win against the New Orleans Pelicans.

The additional transactions come as the Griz announced that point guard Mike Conley will miss another three to four weeks with a sore Achilles.

Conley and center Chris Andersen sat out the past three games. Andersen suffered a partially separated shoulder March 6 in a home game against Phoenix. He remains out and will continue to be re-evaluated.

The Griz play on the road tonight against the Atlanta Hawks at 6:30 p.m. in Philips Arena.

Swingman Vince Carter is also listed as questionable for the Hawks game after he suffered a left calf strain Friday night during the Grizzlies' overtime win over the New Orleans Pelicans.

Zach Randolph (sore knee) remains questionable. Brandan Wright (MCL, left knee) and Jordan Adams (knee surgery) remain out indefinitely and Marc Gasol (broken foot) has been ruled out for the season.

The NBA allows teams to exceed the maximum 15-player roster size when at least four players are injured at the same time.