Toronto's Blue Line Fractures Before Season Opener: Tanev Back, But Rielly, Villeneuve, and Domi Create a Depth Crisis

Chris Tanev has been cleared to participate in Toronto's training camp after missing nearly the entire 2025-26 season with an abdominal injury. The 36-year-old defenseman appeared in only 11 regular-season games last year, recording 2 points and 15 blocked shots—a marginal statistical footprint but a critical absence for a roster that leans on his physicality and willingness to eat minutes in low-leverage situations. His return is legitimate good news. Everything else on Toronto's blue line is a cascade of complications.

William Villeneuve, a 22-year-old depth prospect who signed a two-way contract in July after posting 30 points in 61 AHL games, underwent ACL reconstruction surgery and faces an indefinite recovery timeline. Morgan Rielly is managing a viral illness that will limit his early-camp ramp and raise questions about his availability for the October 3 season opener against Montreal—now less than 16 days away. Max Domi is the most acute problem: he failed his physical due to a chronic back issue and is out indefinitely, with reports suggesting he could miss a substantial portion of the season. In one moment, Toronto has lost three bodies from a defense corps that already lacked organizational depth behind its top two pairs.

The market response to Domi's status will be swift and predictable—fade his individual props entirely, and account for the team's need to move secondary offensive touches to the wings. But the prop angle with real texture involves Rielly's power-play role. Last season, Rielly recorded only 6 power-play points in 78 games, a historically weak output for a $7M+ defenseman. The arrival of Darren Raddysh suggested Toronto was prepared to demote him to the second unit; Domi's absence now creates a vacuum that could elevate Rielly back to first-unit minutes or force Toronto to improvise with inferior personnel, compressing overall offensive efficiency on the man advantage. If Rielly returns to first-unit duty out of necessity, his power-play point total for the season gains leverage. If Toronto sticks him on the second unit to accommodate a rotating cast of fill-ins, his power-play output will remain suppressed—but the team's overall power-play conversion will likely deteriorate, affecting every player on that unit.

Tanev's presence is also a prop anchor worth tracking. His blocked-shot volume correlates directly with ice time in defensive situations; if injuries force Toronto to lean harder on him—logging 22-24 minutes per night instead of his typical 18-20—his blocked-shot line should shift upward. The market will not immediately account for usage creep caused by an understaffed defense. Early-camp blocking numbers from official stats feeds will be inflated by preseason play against weaker competition, creating a false baseline. By the time the regular season begins, if Tanev's actual workload has expanded, sportsbooks will lag in repricing his props.

The calendar pressure is real. Season opener in less than 16 days. Rielly may or may not be game-ready. Villeneuve is gone for months. Domi's timeline is unknown. Tanev's return is the only clean positive in a situation that will force Toronto to shuffle, improvise, and deploy marginal depth against a Montreal team that will smell vulnerability early.