Michael Joseph Tiernan (January 21, 1867 – November 7, 1918), nicknamed "Silent Mike", was an American professional baseball right fielder.

The 17-year-old attracted attention with his success in exhibitions against major league clubs, once striking out 15 in a game against the Providence Grays.

On June 15 of that season, he scored six runs in a single game, and is one of only a handful of major league players to have accomplished that feat.

Tiernan was nicknamed "Silent Mike" because he generally avoided the press and did not protest when umpires made questionable calls.

[1] Tiernan led the National League in home runs in 1890 and 1891, and compiled a .311 lifetime batting average.