During the 2010–11 season, he led Team USA in scoring with 34 goals and 28 assists in 50 games. Grimaldi was eligible to be drafted into the National Hockey League (NHL) in 2011. Prior to the draft, there were concerns about his size. At 5'6", he is smaller than most NHL players. Grimaldi is not concerned about his size, and takes the questions about it in stride, "I think it’s fun." The 2011–12 "Hockey Prospectus" ranked Grimaldi as its #36 best hockey prospect noting that he "overcomes his diminutive size with off the chart intangibles and physical ability."