In the twilight of their careers, Bourque changed franchises, while Marino opted not to do the same.

Bourque finally left Boston when he was traded to the Colorado Avalanche, hoping for one more run at a Stanley Cup. Despite a nice offer from Minnesota, Marino decided not to go out in another uniform and opted to retire.

Here's a look at other legends who changed uniforms at the end of their careers:

NFL
Player	The skinny
Johnny Unitas Quarterback Baltimore Colts	After 17 seasons with the Colts, the Hall of Fame QB was traded to the Chargers for cash in 1973. Unitas played in just five games with San Diego, throwing three TD passes with seven interceptions and a QB rating of 40.0.
Joe Namath Quarterback New York Jets	Broadway Joe is remembered for his Super Bowl III guarantee and flashy personality that lit up New York for 12 seasons. We'd rather forget the four games he spent with the Rams in 1977, when he limped around on his bad knees and threw just three TD passes.
O.J. Simpson Running back Buffalo Bills	After recording the first 2,000-yard season in NFL history and winning four rushing titles during his nine seasons in Buffalo, Simpson was traded to the 49ers in exchange for five draft picks, including a first-rounder in 1979 and two second-rounders. The Juice never did much as a Niner, however, rushing for 593 and 460 yards in his two seasons.
Joe Montana Quarterback San Francisco 49ers	After winning four Super Bowls with San Francisco, Montana finally relinquished the throne to Steve Young when he was injured in 1991. Not finished yet, Montana was traded with safety David Whitmore to Kansas City in 1993 for a first-round draft pick. The Niners eventually dealt that pick for the right to draft Dana Stubblefield. Montana played two seasons with the Chiefs, taking K.C. to the AFC title game in '94.
Franco Harris Running back Pittsburgh Steelers	Yes, Franco actually played somewhere else other than Pittsburgh, where he won four Super Bowls and ran for nearly 12,000 yards for the Steelers. Of course, Harris' eight-game stint with the Seahawks in 1984 was highly forgettable.
Tony Dorsett Running back Dallas Cowboys	After 11 seasons and two Super Bowl appearances with the Cowboys, Dorsett was traded to the Broncos for a fifth-round pick in 1988. He ran for 703 yards and five TDs in his only season in Denver.
Ronnie Lott Safety San Francisco 49ers	Evidently, the 49ers aren't exactly a sentimental bunch. Like Montana and Craig, Lott finished up his storied career elsewhere, playing two seasons apiece with the Raiders (1991-92) and Jets (1993-94).
Bruce Smith Defensive end Buffalo Bills	Just last month, Smith was cut loose in Buffalo, along with Thurman Thomas and Andre Reed. Smith immediately signed with the Redskins. Thomas and Reed are still looking for jobs.