Baseball Marlins: Assigned P Vic Darensbourg to Triple-A Charlotte. Rockies: Signed manager Don Baylor to a two-year contract extension through 1998. Announced coaching staff: Jackie Moore, bench coach; Ken Griffey Sr., first base coach and hitting coach; Gene Glynn, third base coach; Frank Funk, pitching coach; Paul Zuvella, bullpen coach. Invited P Scott Fredrickson, P Doug Million, P Jamey Wright, C Ben Petrick, C Will Scalzitti, C Mark Strittmatter, IF Pedro Castellano, IF Todd Helton, IF David Kennedy, IF Neifi Perez, IF Chris Sexton, OF Angel Echevarria and OF Derrick Gibson to spring training as nonroster players. Basketball Cavaliers: Cleared All-Star F Tyrone Hill, who was injured in an automobile accident two months ago, to practice. Grizzlies: Named Robert Hackett strength and conditioning coach. Nuggets: Activated F Laphonso Ellis. 76ers: Former Bullets G Scott Skiles retired. San Diego (CBA): Ceased operations. Football Browns: Offensive coordinator Steve Crosby resigned. Giants: Gave GM George Young multi-year contract extension. Team will not continue preseason camp at Fairleigh Dickinson. Hockey Islanders: Stopped their efforts to trade suspended C Kirk Muller "due to confusion over the status of Kirk Muller and whether he intends to honor the terms of his contract." Albany (AHL): Recalled F Curt Regnier from ECHL Raleigh. Assigned D Mark Strobel to ECHL Raleigh. Syracuse (AHL): Assigned F Tyson Nash to ECHL Raleigh. Recalled D John Blessman from ECHL Wheeling. Soccer St. Louis (NPSL): Signed F Jeff Bannister and F Steve Ralston to 15-day contracts. Placed F Steve Maurer and F Greg Sczurek on IR. Columbus (MLS): Named Tom Fitzgerald assistant coach.