Ben Lovejoy out 3-4 weeks
Lovejoy injured the knee Sunday in the first period of a 5-2 win over New Jersey. The injury means Lovejoy likely will miss Pittsburgh's first-round playoff series.
Bylsma says it does not appear to be related to the concussion that sidelined Letang for several weeks earlier this season.
Fellow defenseman Matt Niskanen also will not play against the Islanders with an undisclosed injury.
Copyright 2012 by The Associated Press