LOS ANGELES — Drew Allar might be new to the NFL, but his first professional home provides him with some familiarity. Allar will get to back up Aaron Rodgers, a quarterback he looked up to growing up. But he's also joining an offensive system that he already knows with the Pittsburgh Steelers, believing the team that selected him in the third round of April's draft has created a "full circle moment" for him. "The West Coast offense in general was something I studied a lot in the offseasons at Penn State," Allar told me during a conversation this offseason at the NFLPA Rookie Premiere. "Kind of the newer versions like the [Los Angeles Rams head coach Sean] McVay and [San Francisco 49ers head coach] Mike Shanahan. I was on that trend for the last four years. "But it’s now kind of a full circle moment for me, going back and seeing how everything really started. Why the drops are a certain way and how they match up with the progressions. And where the concepts originated from. It’s really cool to be a part of that. It’s a lot of information, but it’s starting to slow down for me." And, as Allar mentioned, he will now get to learn from one of the innovators of the West Coast offense: Mike McCarthy. The new Steelers head coach learned from the originators of the scheme during his time as an assistant coach with the Kansas City Chiefs, including Paul Hackett. Hackett cut his teeth in San Francisco, learning from Bill Walsh, the originator of the West Coast offense. McCarthy would go on to coach Joe Montana in Kansas City before coaching Brett Favre and Rodgers with the Green Bay Packers. He also worked under another Walsh protégé, offensive guru Mike Holmgren. McCarthy has been reunited with Rodgers in Pittsburgh, and Allar said he’s privileged to share a quarterback room with the future Hall of Famer. "I’m really excited to learn from him," Allar told me. "With him being in Coach McCarthy’s system in Green Bay, it’s beneficial because he knows the system inside and out, even though he hasn’t played in it in five or six years at this point. And just everything he’s going through in his career, playing in tens of thousands of snaps, how much experience and knowledge he has — the nuances of playing the position of quarterback, reading coverages, the defensive tendencies — any little thing I can pick up to help me process faster and be more accurate, I’m all in for it." Allar didn’t always play quarterback. His father, Kevin, was Allar’s youth football coach, and as one of the bigger kids on the team, Allar was relegated to playing tight end, fullback, defensive end and linebacker during his early days of tackle football. But the chance to play quarterback full-time emerged in Allar’s first year in high school. "We didn’t have a quarterback my freshman year, and then I always loved throwing from baseball, so...