You have to understand the context of mma at the time. Pride was still competing with UFC(or vice versa), and there were great fighters not fighting in both organization at times. Josh Thomson, Eddie Alvarez, Jacare, Lindland....
Someone mentioned his loss to Dave Terrell, but what about what happened immediately after that fight?
Well, Matt Lindland's next ten fights he went 9-1, with his LONE LOSS being to LHW Quinton Rampage Jackson who literally would be viewed as the #1LHW in the world when Rampage became UFC LHW Champion just 10 months after fighting Lindland. What fight finder won't tell you, is how RAZOR CLOSE that fight with Rampage was.(I'll link it in the following post)
We're talking 185lb Matt Lindland going UP, to challenge one of if not THE BEST LHW at that time, Quinton Rampage Jackson. The fight was back and forth and really showed Lindland(as well as Rampage's) grit.
In those ten fights immediately after his loss to David Terrel, Matt Lindland FINISHED 8/10 opponents and also was the 2nd person(only 3 to have) tko'd Mother Fucking Jeremy Horn, the 1st being LHW Champion in his prime, Chuck Liddell. Not bad for a fucking Middle weight. On top of that accomplishement, the only person to have ever submitted the grappling master Carlos Newton, was the great Kazushi Sakuraba and then of course, Matt Fucking Lindland.
The dude is one of the most underrated fighters of all time. He had a lot of bushido and there was not a challenge he was afraid of, except for maybe roll on deodorant but that's it.