Dave Sims has been the television play-by-play announcer for the Seattle Mariners since 2007, working for regional cable sports network Root Sports. During his first four years, he would call the first three innings on radio with Dave Niehaus announcing on the television side, after which they would swap posts. Since Niehaus' passing, Sims now exclusively works on television. He is one of a very small number of African-Americans working full-time as a baseball announcer.
Sims grew up in south Philadelphia. He attended Bethany College and played catcher on the baseball team while majoring in mass communications. His career started with the New York Daily News as a sportswriter. He also worked a couple of years for the Philadelphia Inquirer.
Sims' first radio job was with WNBC in New York as the host of the radio call-in show SportsNight in the mid-1980s. He later moved to Sports Radio 66 WFAN as co-host (along with Ed Coleman) of a midday show called Coleman and the Soul Man. He also was a weekend sports anchor at WCBS TV.
Beginning in 1991, he worked as an announcer for ESPN. While he only occasionally called baseball games, he also announced college basketball and college football. He has also been a sports writer, a college basketball announcer and a college football announcer for ESPN. He still calls Sunday Night Football on Westwood One radio, which he's done since 2006. (M's radio announcer Rick Rizzs fills in when Sims is away during football season on Sundays.)
- Bill Ladson: "Sims 'living the dream' as voice of Mariners", mlb.com, February 13, 2017.