Rob Smith was a territorial exemption of the BC Lions in the 1981 CFL College Draft. Smith didn't see much action that first season, playing only one game for the Lions. The Torogonto Argos obtained Smith from BC on waivers in 1982, and he played one game with Toronto before being loaned to Montreal for the rest of the 1982 season. Toronto then recalled Smith from Montreal, but the Als apparently liked what they saw and made a permanent deal for Smith, sending WR Kevin Neiles to the Argos in exchange for Smith. Smith played three more seasons for Montreal (1983-85). Montreal traded Smith to Calgary in May of 1986 for defensive back Darrell Moir, and Smith played two plus seasons (1986-1988) with the Stampeders. Partway through his third season, in October 1988, Calgary traded Smith to BC for offensive guard Leo Blanchard. Smith's second stay in bC was a bit longer this time, finishing the 1988 season and all of 1989, before being traded to Ottawa for offensive linemen Rocco Romano, Richard McCrory and running back Chris Skinner. Smith played three years with Ottawa (1990 to 1992), getting his first All-Star recognition. With the Rough Riders, Smith was an East All-Star in 1990 and 1992, as well asa a CFL All-Sar in 1992. Also in 1992, Smith was named the Oustandng Offensive Lineman in the East, and went on to win the CFL Outstanding Offensive Lineman Award. Despit that, Smith was traded yet again in April of 1993, as he returned to BC for his third stint wit hthe Leos as part of an eight player deal. Ottawa traded Smith along with cornerback Less Brown and linebacker Patrick Wayne for offensive linemen Chris Gioskos and Carl Coulter, kicker Wayne Lammie, cornerback Joe Mero and linebacker Kevin Scott. Smith finished his career in the CFL with two seasons in BC (1993-1994), winning West All-Stars in both years, and his second CFL All-Star selecton in 1993.