PITTSBURGH — T.J. Watt stepped into his first defensive meeting of the offseason a few weeks back, not sure what to expect from the Steelers’ new coaching staff. Just as he was settling in, a rookie walked to the front of the room and began giving a presentation on an old-school hip-hop group.“What is going on right now?” Watt remembers saying. “I had no idea what was happening.”The unexpected history lesson was the brainchild of new defensive coordinator Patrick Graham. Each week, Graham picks an artist or a hip-hop collective. Then on Thursdays, one player gives a presentation on where the artist originated, who founded the group and their biggest hit. The player also gets his chance to give his opinion on the music.De La Soul one week. OutKast and Goodie Mob the next. Q-Tip. A Tribe Called Quest. Queen Latifah.“I’ve got to make sure it’s something I want to listen to,” Graham said. “It’s all stuff that I grew up with as a kid, stuff I listened to before the games.”Recently, second-year linebacker Jack Sawyer drew the assignment of the Dungeon Family, an Atlanta-based collective founded in the early 90s by Rico Wade. The collective has included artists like OutKast, TLC, Future and many others. Sawyer said he knew some of the artists, but didn’t realize Future was part of the collective early in his career.“It’s funny because you can tell (Sawyer) was just reading off a Wikipedia page,” veteran Cameron Heyward said. “I’m like, ‘You’re not really listening to that.’”Sawyer, who insists his taste in music includes not only country but also old-school rap, defended himself against the alleged plagiarism.“Of course he said that,” Sawyer said. “Cam never wants to give me any credit. That’s kind of our relationship. It’s funny. They all started laughing. It did sound like (Wikipedia), but I did put some effort into it in my research.”While Graham’s Thursday hip-hop history lessons are unorthodox, there’s a method behind the music. He inherits what’s currently the NFL’s highest-paid defense, with a collective salary-cap hit of $194.6 million. The veteran-laden core, which features several Pro Bowlers, All-Pros and a couple potential future Hall of Famers, hasn’t always lived up to its own lofty expectations and hefty collective cap hit. Graham hasn’t been shy about demanding a high level of performance from this group.“PG has been really clear: He wants it to be the Steel Curtain,” inside linebacker Payton Wilson said. “But we have to earn that right. That’s not just something that comes with being a part of the Steelers.”