George Mullin spent the first 11 years and change of his career with the Detroit Tigers, and while he is not one of the most well-known hurlers in Major League history, he was a major cog in the machine that was the Detroit Tigers in the late 1900s. 

From 1905 to 1910, Mullin went five for six in terms of 20-Win seasons, leading the American League in Wins in 1909 with 29.  The Tigers won the American League three years in a row (1907-09), and while he and Detroit could not win the Fall Classic, Mullin had a 1.86 ERA in his seven Playoff Games.

Mullin finished his pro career with two years in the Federal League.  Overall, the right-hander had a career record of 228-196 with 1,482 Strikeouts.

While George Mullin was not exactly known for his control (he led the AL in Walks four times) he was a workhorse of a power pitcher, exceeding 20 wins in a season six times, including the 1909 season where he led the American League in that category.  Mullin still holds the franchise record for Innings Pitched both all-time and in a single season.

Helping the Tigers win three Pennants (1907-09), Mullin and Detroit may not have won any of those World Series, but he went 3-3 overall with an ERA of 1.86, showing that he certainly did his part.  He was also an excellent batter and was one of the best Detroit ever had.  He batted .261 with 372 Hits for the Tigers.  Overall, he went 209-179 with 1,380 Strikeouts.