Hampered in 1936 by a foul ball which cracked his skull above his right eye and caused double vision, he was a career .233 hitter with no home runs and 64 RBIs in 206 games.

From 1946 to 1978, Mattick worked for nine different baseball organizations including as a scout for the Reds, Houston Astros, Milwaukee Brewers and Montreal Expos.

He was credited by some baseball personnel as an incomparable longtime scout and player development specialist, signing such stars as Frank Robinson, Vada Pinson, Curt Flood, Rusty Staub, Don Baylor, and Gary Carter.

Mattick turned down the job several times before finally accepting; he had initially wanted to manage the team only if he could wear his regular business clothing while in the dugout, rather than a uniform.

Mattick played a key administrative role in scouting and development, leading to the Blue Jays' five AL East division championships, and World Series crowns in 1992 and 1993.