In 1906, Sincock enrolled at the
University of Michigan. He studied engineering there from 1906 to 1908 but did not receive a degree. While attending Michigan, he played baseball as a pitcher for the 1908
Michigan Wolverines baseball team. In his first appearance for Michigan, in May 1908, Sincock was the losing pitcher in a 16-inning game against
Cornell at
Ithaca, New York. Sincock held Cornell to two runs in the first 15 innings, but Cornell scored in the 16th inning to win the game, 3–2. Sincock struck out 11 batters in the game and gave up 12 hits and two walks.
The Michigan Alumnus wrote that the honors of the game went to Sincock and described the winning run as follows: "Cornell came to bat in the sixteenth, and, in the growing darkness, secured a run, winning one of the most sensational games of college ball on record." Sincock pitched again against Brown at
Providence, Rhode Island, on May 23, 1908. Sincock was the losing pitcher in a 5–4 game. Sincock was credited by
The Michigan Alumnus with pitching a good game, but an error in the fifth inning by Michigan's left fielder "let in three runs and seriously affected the result." While attending Michigan, Sincock had also played for the Calumet Aristocrats in the 1907
Northern-Copper Country League. He compiled a record of 6–9 in 15 games for the Aristocrats. He also played for the Harrisburg Senators in the
Tri-State League in 1908. Sincock made his
Major League Baseball debut on June 25, 1908. He pitched innings for the Reds and allowed two runs and three hits. He also struck out one batter. Sincock was also the first British Columbian to make it to the major leagues. It took 47 years for another British Columbia native,
Bob Alexander, to make his major league debut with the
Baltimore Orioles in 1955. ==Later years==