TORONTO - Chad Kackert's comeback with the Toronto Argonauts is on hold.
The running back suffered a pulled left hamstring in practice Tuesday and is expected to be out four-to-six weeks.
While not ideal, Kackert's injury wasn't related to the broken left ankle he suffered last year that forced him to retire prior to the start of the season.
Kackert, 28, ended his retirement last month to join Toronto's practice roster in hopes of returning to the starting lineup.
Kackert broke his ankle prior to the 2013 East Division final and was forced to retire the first day of training camp because the injury hadn't healed sufficiently.
Kackert remained with the Argos as their strength-and-conditioning coach.
