BASEBALL

Cincinnati Reds -- obtained C Bo Diaz and minor league P Greg Simpson from Philadelphia for IF Tom Foley and two players to be named later, one likely C Alan Knicely, who was sent to Phillies' Portland, Ore., farm club; returned C Dann Bilardello to Denver farm team and called up IF Tom Runnells.

Seattle Mariners -- Announced OF Ivan Calderon has a broken left wrist and may miss the rest of the season. FOOTBALL

Atlanta Falcons -- Signed WR Vince Courville, formerly with the Houston Gamblers (USFL).

Indianapolis Colts -- Signed No. 1 draft pick LB Duane Bickett.

Miami Dolphins -- Signed LB Steve Potter, WR Victor Otis, WR Danny Knight.

San Francisco 49ers -- Signed CB Wymon Henderson, formerly of the Los Angeles Express of the USFL; C Mark Shupe, and C Chris Jackson. HORSE RACING

The Arlington Million -- The race will be held at Arlington Park in suburban Chicago Aug. 25 as originally scheduled, despite a massive fire at the track recently, according to the Chicago Tribune. The report said there will be tents and temporary stands. JURISPRUDENCE

The Philadelphia district attorney's office said it will not prosecute Kurt VonColln, a police officer who shot to death former NFL lineman Charles Janerette Jr. in October. GOLF

Ryder Cup -- The 1991 matches will be played at PGA West, a course under construction at LaQuinta, Calif. COLLEGES

George Mason -- Announced an assistant coaching vacancy, in women's track, with the resignation of Dan Grimes after two years, and filled another by hiring Will Robinson, a staffer at Fairfax's Robinson High School, to assist with women's basketball.