In a pretty grim return on their investment, the Los Angeles Rams have traded 2014 No. 2 overall pick OT Greg Robinson to Detroit for a 2018 sixth-round pick, reports Adam Schefter. Robinson, who was among the haul of picks the Rams received in the RGIII trade, has been a huge disappointment. The Auburn product never impressed and, after showing up overweight to camp in 2016, was a healthy scratch twice during what proved to be his final season with the Rams. Because of some musical chairs on the O-line, there wasn’t going to be a place for him to start in L.A. this year. The signing of veteran left tackle Andrew Whitworth this winter prompted the Rams to move Robinson to the right side, where they initially said he could compete at the guard position. They backed off on that, prefer…