The 6-foot-6, 215-pound Kennedy helped new Mavs general manager Gersson Rosas' Rio Grande Valley Vipers win the D-League championship last season, averaging 21.3 points, 9.3 rebounds and 6.3 assists per game during the playoffs. Kennedy, 23, was a D-League all-star who averaged 16.6 points, 7.7 rebounds and 5.1 assists. The St. John's product appeared in two games for the Cleveland Cavaliers during the 2011-12 season.
McConnell (6-0, 189) averaged 13.6 points, 3.5 rebounds and 2.7 assists in 32 games for Tenevis VE in the Italian league last season. He played his college ball at Saint Mary's from 2007 to 2011, earning West Coast Conference player of the year honors as a senior.
The Mavs now have 18 players under contract, including 15 with guaranteed deals.