But he does now.
The manager only appears fleetingly in the "true to life" movie of the Ticos' greatest sporting achievement. But he is played by thirty-something self-style "Gringo Reporter" and sometimes-extra called Robert Isenberg, who doesn't even know his name.
Mr Isenberg, writing in the English-language Tico Times, described the scene as "brief but significant". Sparks fly, literally, as the Ticos scrape their metal studs and tough-talk the Scots in the tunnel.
"For Ticos, Italia 90 isn't just a movie," the American explained. "It's a chance to relive a national triumph.
"You could say 1990 was La Sele's 'Rocky' moment: They didn't win the cup, but their success won international acclaim and boosted Costa Rican confidence."