The Undertaker is one step closer to Broadway. Dylan McIlrath, the Rangers’ 6-foot-5, 21-year-old defenseman with the macabre nickname, is anticipating his left knee will be 100 percent by the opening of training camp in early September and has his sights set on making the team. “I think I have a legitimate shot,” McIlrath said yesterday at the opening of the weeklong prospects camp in Westchester, the place where a year ago he collided with Kyle Jean and dislocated his kneecap, forcing major reconstructive surgery that abbreviated his first pro year. “I’m going to work my hardest,” said McIlrath, the team’s first-round selection (10th overall) in the 2010 draft. “The knee is not an excuse anymore — it’s over and done with. Hopefully by camp I’ll be 100-percent ready and I’ll have a good shot.” The biggest attribute the 220-pound McIlrath carries is his toughness. His moniker came from a long line of fights and the stockpiling of penalty minutes. After returning to the AHL’s Connecticut Whale last season following surgery, McIlrath had 125 penalty minutes in 45 games. Most of them came within the first two months following his return, as he began to climb back atop a pedestal of enforcement. “It was definitely an adjustment,” McIlrath said. “I’ve never come back from an injury like that, so it was tough. Getting my skills back, that came back pretty quick. It took me about a month before I could skate with the guys.”