The Memphis Grizzlies have signed Rio Grande Valley Vipers forward Chris Johnson. 

Johnson (6-6, 201, Dayton) has appeared in 21 games for the Vipers this season, averaging 12.6 points, 4.0 rebounds, 1.8 steals and 29.0 minutes. He scored a season-high 29 points in a 127-104 win over the Los Angeles D-Fenders on Jan. 7 at the 2013 NBA D-League Showcase in Reno, Nev.  He ranks fourth in the League in three-pointers made (54), and is tied for sixth in steals (38).