Honestly, I think that "10-15 up with just a few less mental blunders and dumb mistakes" is insupportable. Look at the standings. We're up 4.5 on the Yankees because we are 18 games above .500 and they are 9. For us to increase that lead to 12.5 games--the mean between 10 and 15 games up--we would have to be 34 games above .500, which would give us the best record in the AL and the 2d best record in MLB. All because we are too aggressive on the basepaths or JBJ forgets how many outs or whatever? Give me a break.
Besides, I think you are focusing on the wrong fundamentals. By far the two dominant fundamentals in baseball are hitting and pitching. After that, quite a way back in my opinion, comes fielding. Then maybe baserunning. Then maybe playing smart--hitting the cutoff man, covering 1b on grounders to the right, staying focus on the game situation (number of outs, what you should do on a grounder or fly, remembering who to backup if the other team hits a double or something).
Last night was a classic example of the fundamentals taking over. In the 2d inning many thought we blew the game when Beni tried for an extra base on a single and was out. This was was supposed to be our big inning, but he ruined it with his recklessness. Really? In the 1st we had the bases full with 1 out and Bogie, Devers, and HanRam quickly succumbed to Sabathia's mastery. Interestingly, if Beni has not run in the 2d, Betts would have come to the plate with men on 1st and 3d and no one out. Guess what? Betts and the next four guys in the lineup last night never got a single hit. In the 9th the Yankess bullpen gave up 3 walks and an HBP which scored 1 run for us, but we never got a hit.
We lost last night on the fundamentals, no question, but the fundamentals were hitting and pitching and not whether Beni was too aggressive.
We went 16-4 in the first part of August because we had good pitching and good hitting. We are struggling now because the hitting is unquestionably soft. The Nunez/Devers charge to the system has worn off. We took 3 straight from Toronto because they just might have the worst bullpen in the history of baseball (not really), but we got exactly 1 run per game off their three starters. That, sports fans, is ineptitude so great that worrying about aggressiveness on the base paths or not being alert about game situations or being unable to reliably go back on a pop up or whatever other "fundamental flaw" you want to name to me makes no sense. If we can't hit any better, that fundamental flaw will kill us this month--deservedly so.
I would like to amend the above by of course agreeing that pitching, the other dominant fundamental, was clearly key last night. Sabathia was way better than ERod even though ERod at least started OK. If Nunez hadn't missed that popup and Betts not allowed him to, ERod would have gone 5 while giving up 1, not bad. Come the 6th, however, the deluge.