Double Meatballs
The cat that Adam Sandler's character, Dave, dresses up for the Husky Cat Clothing Line is named Meatball. Meatball is the name of Adam Sandler's real life dog.
The real life Meatball can be seen with Dr. Buddy Rydell (played by Jack Nicholson) on the back of Rydell's book in the film. Linda, played by Marisa Tomei, is seen reading the book toward the end of the film and on the back cover is a profile of Dr. Buddy Rydell with a picture of the doctor holding a dog, which is the real-life Meatball.
Hometown Reference
In each of Adam Sandler's movies he makes a reference to his hometown of Manchester, New Hampshire. In Anger Management he can be seen wearing his high school T-shirt, a green "Central Pride" shirt.