Castellanos singled in the first, doubled and scored in the fourth, hit an RBI double in the fifth and hit a two-run home run off Jeanmar Gomez (0-1) in the seventh.
Harbaugh told reporters Monday night all team issued-shoes of current players have been accounted for by the school.
Sports Highlights and Scores from Monday, August 13, 2018
The slick-fielding Broxton has a .185 average with two homers and six RBIs in 25 games at the big-league level.
Michigan Tech raised over $4,000 last November through an auction that featured a special camouflage hockey jersey worn during a 4-1 victory over Northern Michigan.