The Wizards have agreed to terms on non-guaranteed training camp deals with big men Earl Barron and Shavlik Randolph and point guard Steven Gray, according to sources with knowledge of the situation.

With training camp set to start at George Mason in less than three weeks, there is a roster spot available should the Wizards decide to go with the maximum 15 players. They have 13 players signed to fully guaranteed contracts and second-year point guard Shelvin Mack has a partially-guaranteed deal.

John Wall, Martell Webster, Trevor Booker and Chris Singleton are among the players already at Verizon Center working out in anticipation of the first practice on Oct. 2.

Barron, 31, is an undrafted journeyman out of Memphis who has played for six teams since making his debut with the Miami Heat, where he won a championship in 2006.

The 7-foot Barron appeared in two games with the Golden State Warriors last season, and he has also played for Portland, Phoenix, Milwaukee and New York, posting career averages of 5.1 points and 3.6 rebounds.

Randolph and Gray both played for the Wizards’ summer league team in Las Vegas and earned invitations for their performances. The 6-10 Randolph averaged 7.3 points and a team-best 7.8 rebounds in four games but was especially effective in the last two games, posting a combined 27 points and 25 rebounds.

A former standout at Duke, Randolph, 28, has five years of NBA experience — having played in Philadelphia, Portland and Miami — and career averages of 2.4 points and 2.4 rebounds. He hasn’t played in the NBA since the 2009-10 season.

Gray, a former star at Gonzaga, averaged 7.3 points and 2.0 assists in three games and scored eight points, including a late, tying long jumper in a win over Milwaukee. The 6-4 Gray, 23, played last year in Latvia.

Yahoo! Sports was first to report Barron’s signing.