He finished his 17-year career with 56 interceptions, and ranks seventh all-time in Redskins career interceptions with 27 and fourth all-time with 412 career interception return yards. At the time of his retirement, Fischer had played in 213 NFL games, then a record for a cornerback. He was well known for his strong tackling skills despite his diminutive size. Some of Fischer's most memorable defensive match-ups occurred against Philadelphia Eagles receiver Harold Carmichael who stood eleven inches taller than Fischer. Fischer's mantra "get a leg up and you own him" is used today to motivate and teach smaller defensive backs how to defend taller wide receivers.
In the late 1980s, NFL Films named Fischer as the Redskins All-Time Neutralizer sponsored by Tums. After retiring from the Redskins, Fischer worked as a stockbroker and owned a successful real estate business.