TORONTO - Nic Grigsby will make his Hamilton debut in the Tiger-Cats' most important game of the season.

Hamilton coach Kent Austin said the speedy running back will definitely play Saturday when the Ticats (7-8) face the Toronto Argonauts (6-9) at Rogers Centre.

The contest is a pivotal one for both teams as the winner will clinch the season series, which is the tiebreaker should the two rivals end the year tied.

Grigsby joined the Ticats earlier this week after being released by the Winnipeg Blue Bombers.

He is tied for the CFL lead in touchdowns (nine) and is fourth overall in rushing with 744 yards.

Hamilton will be without slotback Andy Fantuz (hamstring), who has a team-high 62 catches for 639 yards and three TDs.