Shelvin Mack knows how to stay ready.

The Maine Red Claws guard has not received a call from the undermanned Boston Celtics, but if he does, he will be prepared to take his game back to the NBA.

Mack could be an option to fill an open roster spot following the season-ending ACL injuries suffered by Rajon Rondo just over two weeks ago and Leandro Barbosa on Monday. He leads the Celtics NBA Development League affiliate in scoring this season (19.6 ppg) and is also averaging 7.6 assists and 4.7 rebounds per game.

Mack was in Texas on Tuesday evening with the Red Claws to take on the Rio Grande Valley Vipers. While aware of the Celtics backcourt vacancies, he was focused on doing the best he could in his current situation just hours before tip off.

"I feel like it would be a great opportunity," Mack said of the Celtics, adding, "(I haven't been given any indication from the Celtics), I try not to worry about that. That's another thing I've learned throughout this process, just worry about the things you can control. I can't control how they're thinking, All I can control is just going out and playing basketball, trying to be a great basketball player and a great teammate."

At 22 years old, Mack already has NBA experience. He was selected by the Washington Wizards with the 34th overall pick in the 2011 NBA Draft and appeared in 64 games for them last season. He posted 3.6 points, 2.0 assists, and 1.4 rebounds in 12.2 minutes backing up John Wall.

The Wizards invited Mack to training camp this season, and although they waived him in October, they called him up from the Red Claws in December. After Mack returned to Maine in early January, the Philadelphia 76ers called him up twice. He believes there is a place for him in the pros.