Lee Matthew Gronkiewicz (born August 21, 1978) is an American former Major League Baseball relief pitcher who played for the Toronto Blue Jays in 2007.

head coach of the Columbia Blowfish and is also involved with USA baseball on the college national team selection committee.

A native of Los Angeles, California, Gronkiewicz attended Lancaster High School in South Carolina.

[3] He spent four years in Cleveland's minor league system before he was acquired by the Toronto Blue Jays in the 2004 Rule 5 draft.

In seven minor-league seasons, Gronkiewicz has a career 18–16 record, pitching almost entirely in relief with just one start for the 2007 Syracuse Sky Chiefs, putting up a 2.48 ERA and a 1.16 WHIP along the way.