BASEBALL American League * AL -- Suspended Kevin Reimer, Texas Rangers outfielder, for three games for charging the mound against Milwaukee on Aug. 4.
* Chicago White Sox -- Signed Greg Brock, first baseman, and assigned him to Vancouver of the Pacific Coast League.
BASKETBALL Continental Basketball Association * La Crosse Catbirds -- Signed Tom Copa, center.
* Tri-City Chinook -- Acquired the rights to Perry Young, guard, from the Oklahoma City Cavalry for a 1991 fourth-round draft pick.
* Wichita Falls Texans -- Traded the rights to Greg Sutton, guard, and two 1991 first-round draft picks to the Fort Wayne Fury for the rights to Scooter Barry, guard, and a 1991 first-round draft pick.