In September 1987, he signed to be part of the Washington Redskins replacement team.[2] He completed the longest pass from scrimmage in the 1987 NFL season, an 88-yard touchdown to Anthony Allen on October 4, and led the Redskins to two consecutive wins on their way to a Super Bowl XXII championship.[3]
Rubbert also started a third game only to be injured in the first quarter; the Redskins eventually won that game behind backup replacement quarterback Tony Robinson.[4] The following week the Redskins' regular players returned to the field following the end of the strike and Rubbert finished with 26-of-49 (53.1%) completions for 532 yards, 4 touchdowns, one interception and an undefeated record (3–0).
Rubbert also played for the Albany Firebirds in the Arena Football League (AFL) for three years (1991 to 1993) where he completed 42 of 96 passes for 532 yards and four touchdowns and seven interceptions.[5]