Ristolainen produced an assist and three hits in Thursday's 7-5 loss to the Panthers.

Ristolainen notched an assist, four shots on goal and a plus-2 rating in Saturday's 3-2 overtime win over the Blackhawks.

Ristolainen notched an assist, four hits and a plus-2 rating in Saturday's 4-3 shootout loss to the Panthers.

Ristolainen generated one goal, one assist, five hits and two blocked shots in a 7-5 win over the Wild on Saturday.

Ristolainen (triceps) was seen skating with his teammates Sept. 3 and is expected to be ready for the start of training camp, Jon Bailey of Philly Hockey Now reports.

Ristolainen underwent surgery for a ruptured triceps tendon, the team announced Thursday. He is expected to be fine for the start of training camp.

Ristolainen (upper body) was placed on injured reserve Monday, per the NHL media site.

Ristolainen (upper body) will undergo a procedure in 2-3 weeks and will be re-evaluated at that point, Kevin Kurz of The Athletic reports.

Ristolainen (upper body) is out Monday against Arizona and is not expected to play Thursday against Toronto.

Ristolainen (illness) will return to the lineup versus Seattle on Saturday, per Jordan Hall of NBC Sports Philadelphia.