[4] At Jefferson High he was a star football player, twice earning all-Peninsula Athletic League honors as a quarterback.

[5] Mossi was spotted at an early age and signed by the Cleveland Indians after leaving high school in 1949.

[7] His major league debut came on April 17 of that year in an 8–1 loss to the Chicago White Sox as Mossi pitched three innings and allowed one run.

[8] The first batter Mossi faced as a major leaguer was future Hall-of-Famer Nellie Fox, who reached base on an error.

Mossi, along with Narleski and Ossie Alvarez, was traded to the Detroit Tigers on November 20, 1958 for Billy Martin and Al Cicotte.

The trade meant that Mossi was guaranteed a spot in a major league starting rotation, something he had missed with the Indians.

Mossi pitched the greatest season of his career in 1961, going 15–7 with a 2.96 ERA on a Tigers club that recorded over 100 wins.

It was not long after this that he began to experience problems with his throwing arm, and in his final two years with the Tigers he went 18–20 with a combined ERA of 4.01.

[13] After the death of Ray Narleski (2012) and third baseman Al Rosen (2015), Mossi became the last surviving member of the 1954 Indians' pitching staff.