Tiernan had 10 Home Runs as a rookie (which was great for this era), and he would help the Giants win the 1888 and 1889 versions of the World Series. Tiernan batted .335 in 1189, and he had six more .300 seasons. His best seasons were in 1890 and 1891, where his 13 and 16 Home Runs would respectively lead the National League, and he had five .490 plus Slugging years, including a league-leading .495 in 1890.
He retired with 106 Home Runs, which again we have to state was a very good number for a player who never had a Major League At Bat after 1899! Tiernan also had 1,838 career Hits and a lifetime Batting Average of .311. Despite all of those accomplishments, Tiernan was never on a Hall of Fame ballot.