At age 22, Neilson, nicknamed "Chief," stepped into a regular role as a defenseman with the Rangers in 1962-63.
"All of a sudden, you're playing defense against the [Gordie] Howes and the [Jean] Beliveaus," he told Marks. "They can make you look small, so you have to really get to know yourself, know what your capabilities are. Whereas you have to realize that you're progressing at the same time, you still have to have confidence. You don't let your mistakes beat you. You learn from your mistakes."
The Rangers were in a down phase when Neilson arrived in New York, but he and longtime defense partner Rod Seiling were keys to their improvement in the late 1960s.
In 1967-68, Neilson was fourth in voting for the Norris Trophy as the top defenseman in the League and was named an NHL Second-Team All-Star. He had the best offensive season of his NHL career in 1968-69 with 44 points (10 goals, 34 assists) in 76 games.
"Chief was tremendous on defense there when we got Rod Seiling and all these young guys," Rangers teammate Rod Gilbert told NHL.com. "We started to be really successful. Chief and Brad Park were the two best defensemen on the Rangers, though there was nobody close to Brad. Jim was a stay-at-home guy with a great shot. He had an offensive side too. I enjoyed playing with him a lot."