Murphy is played by Darwin Barney, who played in the major leagues from 2010-2017 for the Chicago Cubs, Los Angeles Dodgers and Toronto Blue Jays.
This movie was filmed entirely in Oregon. Both Alex Frost and Darwin Barney are from Oregon.
A character on another team is announced as "David Tokheim". There is an actual David Tokheim, an outfielder who played in the Philadelphia Phillies organization from 1991 to 1996.