Michael Joseph Tiernan (January 21, 1867 – November 7, 1918), nicknamed "Silent Mike", was an American right fielder in Major League Baseball who played exclusively for the New York Giants from 1887 to 1899. Born in Trenton, New Jersey, his debut game was on April 30, 1887. His final game was played on July 31, 1899. Tiernan led the National League in home runs in 1890 and 1891, and compiled a .311 lifetime batting average. He is the Giants' all-time franchise leader in triples and stolen bases. One of the great home run hitters of the 19th century, he hit 106 of them, which ties him with Hall of Famer Dan Brouthers for fourth most among 19th century ball players.

Tommy Tiernan (born 16 June 1969) is an Irish comedian, actor and writer. He and Hector Ó hEochagáin presented The Tommy and Hector Show on i102-104FM. Tiernan also featured in Father Ted as a depressed priest.

Tiernan was born in Carndonagh, County Donegal. His father is a native of County Kerry while his mother is from County Limerick. He moved, with his family, from County Cork as a child. After spells living in Zambia and London, he attended the same school as Irish television presenter Hector Ó hEochagáin and Dylan Moran, in St. Patrick's Classical School, Navan, Co Meath, a former Roman Catholic junior seminary. He later attended a boarding school, Garbally College, in Ballinasloe, County Galway.^{[citation needed]}

Tiernan has appeared several times on The Late Late Show. In the United States he has appeared several times on the Late Show with David Letterman. Recently^[when?] he appeared on the Michael McIntyre Comedy Roadshow, Lee Mack Show, DAVE's One NIght Stand and joined comedic legends Eddie Izzard and Ross Noble at Laughs in the Park.