Baesman was a good fighter in his Bellator tournament days. He might've had some injuries and lost that fire to train as hard as possible for an extra 1k every couple months and a chance to make it into a bigger show again one day.
And beating Baesman quicker than anyone else in Baesman's career is a good accomplishment.
I've also always wondered how Leben would do if he worked on his boxing more... although he was such a sloppy brawler for so many of his fights (I think his addiction problems might have had something to do with that, poor in-fight decisions and lackluster training and whatnot), he had a real good sense of timing with his counter-left. Despite, at 5'11, being a shorter middleweight with a lackluster reach, and eschewing head-movement. He rocked Sexyama with it, and it produced the Terry Martin KO.
Leben's clinch-wrestling skill was probably the most underrated aspect of his entire game; he might've gotten taken down from there a number of times, but you can count on one hand the number of fights he was outmuscled in the clinch. And, along with his giant back, his sophomore bareknuckle fight shows why. It was his #1 aim in most of his fights; get into clinch/apply collar tie/hooks+uppercuts.
He also looked a lot sharper in a lot of his old sparring footage with the Team Quest guys; a lot more crisp than you'd expect given his biggest UFC fights. And he was never the fastest guy, so slowing down as he gets older shouldn't be a problem as long as he's still got power. If he's able to keep up the hard training camps, Leben's handwrap boxing-- I mean bareknuckle boxing career could take a really impressive, unique turn.