There were (three) open tryouts scheduled in March 1979: Bloomington, Minnesota, Oak Park, Michigan and Danvers, Massachusetts.
From there, players were selected to participate in the National Sports Festival held in Colorado Springs, Colorado at the end of July 1979.
In August, after that tourney, Herb Brooks named 26 players to his squad but I am not sure of names who were cut:
3 goalies: Jim Craig, Steve Janasak and Bruce Horsch
8 defensemen: Les Auge, Bill Baker, Bob Suter, Jack Hughes, Ken Morrow, Jackie O'Callahan, Mike Ramsey and Gary Ross.
5 centers: Neal Broten, Mark Johnson, Mark Pavelich, Mark Wells, Dave Delich
5 LWs: Eruzione, McClanahan, Harrington, Schneider, Verchota
5 RWs: Ralph Cox, Christian, Christoff, Silk and Strobel
Another forward was Tim Harrer who Brooks forgot to introduce at a luncheon in January 1980 (he played for Brooks) and it was met with joking but he was considered a longshot to make the team.
Eruzione broke his wrist in one of the exhibition games and missed about a dozen or so. The US record was 42-16-3 in a 61-game schedule entering the Olympics.
The team was reduced prior to the opening game against Sweden and injured Jack O'Callahan was among the players named.