You think I spouted a stat that I pulled out of my ass? Take a look for yourself (which you should have done anyway rather than say "that needs to be checked"):
Diekman's 2022 game logs. Only one game in which he both walked a man and was charged with a run scored. That was Opening Day and the runner that scored was the Manfred man in the bottom of the 10th (allowed by Brasier but charged to Diekman). The walk was an intentional one set up a force play at each base. His other seven walks came in games where he wasn't charged with a run, therefore none of the batters he's walked have scored.
You are correct that two games were lost when he blew 9th inning leads. One was the Toronto game I mentioned in which George Springer homered to tie the game. He faced five batters, gave up three hits and struck out the other two, no walks. The other was last week against the Angels. He came in after Robles walked two straight batters and gave up an inherited runner to tie the game. Diekman walked one of the three batters he faced but that runner was stranded when he got the third out on a flyout.
I've already addressed the game you're describing where he walked the bases loaded. Barnes closed that one out, not Diekman (though Diekman did K the last batter he faced which might be what you remember).