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Tyson Alualu left the first half of the Steelers' Week 2 home game against the Raiders with an ankle injury. Alualu has reportedly suffered a broken ankle, according to NFL Network's Ian Rapoport. 

A 12-year veteran, Alualu has been a key role player in Pittsburgh's defense since he initially signed with the Steelers during the 2017 offseason. He started the Steelers' first two games with Stephon Tuitt currently on injured reserve. Alualu has made 24 starts in 64 regular season games with the Steelers. His presence in Week 1 helped the Steelers' defense hold Josh Allen to 254 net passing yards in Pittsburgh's 23-16 victory. 

Alualu was one of two Steelers defenders who suffered injuries during the first half, as outside linebacker T.J. Watt is out with a groin injury. Pittsburgh started Sunday's game without starting cornerback Joe Haden and starting inside linebacker Devin Bush. Both players are out with groin injuries. 

The Raiders led the Steelers at halftime, 9-7.