Ray McCallum has decided to enter the 2013 NBA Draft. 

McCallum averaged 13.5 points, 4.9 assists and 4.7 rebounds per game in his junior season at Detroit.

McCallum averaged 18.7 points per game as a freshman.

Grant Jerrett has declared himself eligible for the NBA draft.

A 6-foot-10, 235-pound forward, Jerrett averaged 5.2 points and 3.6 rebounds in in his first and only season at Arizona.

Jerrett shot 40.5 percent from beyond the three-point arc and 81.8 percent from the free throw line.

“I would like to wish Grant well as he pursues his goal of becoming a part of the NBA,” Wildcats coach Sean Miller said in a statement. “Not only is Grant a talented player, but he is an even better person with a wonderful and supportive family. I look forward to helping him in any way that I can as he moves forward in his basketball career.”

Jerrett is expected to sign with agent Brian Dyke.

Michigan junior guard Tim Hardaway, Jr. decided Wednesday to forgo his final year of eligibility and declare for the NBA draft.

He joins Wolverines teammate Trey Burke.

"I made my decision yesterday," Hardaway said. "It felt good, felt better about myself and it was good to get it off my shoulders."

Hardaway, the son of former NBA star Tim Hardaway, consulted with his father, his coaches and Burke about the decision.

UCLA freshman Shabazz Muhammad has announced that he will leave school for the NBA.

The Pac-12 co-freshman of the year was the leading scorer for the Bruins with 17.9 points per game.

"I am so thankful for the once-in-a-lifetime opportunity to play at UCLA and will always be proud to be a Bruin," Muhammad said in a statement released by the school. "From a young age, I have dreamed of playing in the NBA, and I believe that this is the right time for me to move to the next level."

North Carolina junior forward Reggie Bullock has decided to enter the NBA Draft, according to a source.

A formal university announcement is expected as soon as Tuesday.

Bullock, 22, has gone back and forth on his decision, but ultimately decided in the past 48 hours to make the move.

Otto Porter, Jr. will leave Georgetown after his sophomore season.

The forward has declared himself eligible for the NBA draft.

Porter was the Big East player of the year and finished second in the voting behind Michigan's Trey Burke for The Associated Press player of the year award.

Kentucky forward Nerlens Noel, who is recovering from a torn ACL, has officially announced his intention to enter the NBA Draft.

The 6-foot-10 freshman sustained a season-ending knee injury on Feb. 12.

Noel said in a statement released by the university that he's loved his time with the Wildcats but feels he's "ready to take the next step to the NBA."

Despite his injury, many expect him to be a possible No. 1 pick.

Maryland sophomore center Alex Len will enter the NBA Draft, according to a source.

Len is considered by many to be a top 10 pick.

The 19-year-old will finalize his decision at a press conference sometime this week.

Len averaged 11.9 points, 7.8 rebounds and 2.1 blocks for the Terrapins this past season.

Michigan Wolverines sophomore guard Trey Burke will enter the NBA draft, according to sources.

The school has scheduled a news conference for Sunday afternoon, during which the consensus national player of the year will announce his decision.

Burke is projected by most to be a lottery pick.

Jamaal Franklin plans to sign with an agent and put his name in the June draft, forgoing his final season of eligibility at San Diego State.

Franklin, a 6-foot-5 guard, averaged 33.1 minutes per game and led the Aztecs in scoring (17.0), rebounding (9.5), assists (3.3) and steals (1.6).

Franklin was the only Division I player in the country to lead his team in all four categories.