False, it got called "The Brady rule" because he was the last QB to get a torn ACL, the rule was actually in response to Carson Palmer's season-ending injury in 2006,
"On January 8, 2006, the Bengals met their division rival Pittsburgh in the first round of the AFC playoffs at Paul Brown Stadium in Cincinnati.
On the Bengals' first pass play, Carson Palmer threw a 66-yard pass to rookie receiver Chris Henry. It was the longest completion in Bengals playoff history. After Palmer released the pass, Steelers defensive tackle Kimo von Oelhoffen was pushed from behind while diving for Palmer, violently wrenching Palmer's knee, and he was forced to leave the game. A magnetic resonance imaging test revealed a severe knee injury, thought to be career-threatening at the time; Palmer had tears of both the anterior cruciate and medial collateral ligaments as well as cartilage and meniscus damage. Coincidentally, Henry himself suffered a knee injury on the same play, though far less severe. Having knocked Palmer out of the game the Steelers went on to win 3117.
During the off-season, the league's Rules Committee modified the rule regarding low hits on quarterbacks. The new rule prohibited defenders from hitting a passer at or below the knee unless they are blocked into him. The so-called "Carson Palmer Rule" now requires that defenders take every opportunity to avoid hitting a quarterback at or below the knees when the quarterback is in a defenseless position looking to throw with both feet on the ground."
The Brady-hate is so strong people like to ignore the fact the rule was already in place when he got hit. Really, I don't get it, despite a mediocre showing last week I've always had the deepest respect for PM as a great, HOF QB, why the hate for Brady is so severe I don't understand, I've never heard him disrespect another player or team, ever..