VANCOUVER, British Columbia (AP) -- There'll be more at stake than top spot in the West Division when Calgary Stampeders and B.C. Lions meet Friday night at B.C Place Stadium.

Calgary (5-1-1) has the CFL's top record, just ahead of B.C. (5-2). But the teams have split their previous two meetings, meaning the winner not only assumes first in the West but also clinches the season series, which is the tie-breaker should they end the season tied.

B.C. won the first meeting 20-18 in the season opener for both teams. Chris Rainey figured prominently in that game for the Lions with two TDs, including one on a 72-yard punt return.

Calgary outscored B.C. 22-7 in the fourth quarter July 29th en route to a thrilling 44-41 overtime victory at McMahon Stadium. Quarterback Bo Levi Mitchell completed 29-of-44 passes for 364 yards and three TDs.

Calgary is unbeaten in the six games since its loss to B.C. Mitchell leads the CFL in TD strikes (12) and is second in passing (2,194 yards) with only four interceptions.