The New York Giants selected Hostetler in the third round of the 1984 NFL draft out of West Virginia University. Hostetler would back-up one of the greatest quarterbacks in Giants history, Phil Simms, before getting his chance to show his mettle several years after he was drafted.
The season where Hostetler would leave his mark as a New York Giant was the 1990 campaign, into the playoffs (occurring during early 1991). Simms went down with a foot injury in mid-December of 1990 and Hostetler took over as the starting quarterback for the remainder of the Giants season.
Hostetler led New York to victories in the final two regular season games, throwing for a combined 313 yards, two touchdowns and no interceptions. Hostetler and the Giants would march through their three playoff games that post-season, putting up some impressive numbers. After a 31-3 victory over Chicago, the Giants won a close NFC Championship game against the San Francisco 49ers, 15-13, and an even closer game in the Super Bowl Championship versus the Buffalo Bills, 20-19.
In those three playoff games, Hostetler would complete 45 of 76 passes for 59.21%, 510 total yards, three touchdowns and no interceptions.
Hostetler played two more seasons with the Giants before moving on to the Raiders for four seasons, and winding up his NFL career in one season with the Washington Redskins in 1997.