Wayne Rooney is not a fan of the trading system in Major League Soccer, which he believes is unsuitable for the North American game and its players.

An incident early in Rooney's D.C. United career didn't sit well with the English legend, who was blindsided by the different style that MLS operates compared to what he was used to in the Premier League.

"I didn't realize it obviously before I went, but when I got there (MLS), I seen it," Rooney said on Quincy Amarikwa's "Ask A Soccer Pro" podcast. "My first week, we had a player who, when he finished training, he got told he was getting transferred onto somewhere else.