Joe Montana never lost a super-bowl. 4-0.
2-3 win-loss record with 6 TDs and 7 interceptions
His two wins were early in the 1980s. After the Giants became a solid playoff contender in 1985 he was 0-3 with 1 TD and 3 interceptions. He also got knocked out of the two playoff losses in the Giants' two Super Bowl years of 1986 and 1990.