Orioles 5, Royals 4(8)

Home plate umpire Wally Bell left the Baltimore-Kansas City game in the top of the sixth inning Friday night because of heat exhaustion and dehydration.

The 45-year-old Bell, who had open heart surgery in 1999, was led off the field by Royals trainer Nick Kenny. The umpire wasn't taken to a hospital.

Todd Tichenor, who was the second base umpire, replaced Bell behind the plate and the game continued with a three-man umpiring crew.

Bell has umpired in the major leagues for 17 years.