I am assuming this is Bud Crawford we are talking about. Essentially his whole career was at 147 pounds or below. He had one fight at junior middleweight and one fight at super middleweight. Both of those fights were late in his career. While he performed admirably against Canelo Alvarez, I don’t see a reason for him to fight heavyweights champions. I am a big Crawford fan, but the reality is that his win over Alvarez was against a very faded Camelot and doesn’t mean that Bud would’ve been able to beat other bigger fighters. By bigger I don’t mean bigger than Crawford. I mean bigger than the fighters he was used to fighting. If we are taking the Crawford who fought Alvarez and putting him against prime Sharkey or prime Schmeling then Bud is going to lose. If we are putting prime Crawford against those two, then Crawford will be weighing 147 and Bud is going to lose.
Bud didn’t enter the ring at 147 when he fought there though, even at 154 he rehydrated to like 169. For this hypothetical I’d pick the bigger versions of Bud.
Based on nothing. He has never faced the obstacles & conditions those fellas from the 20s & 30s faced so you can't really gauge how he would fare in that era .. take away all his modern advantages .. have him face 6oz gloves, same day weigh ins & take away his SNAC.. throw in the higher fight frequency that went on back then, the fewer divisions & the poorer recovery methods etc.. you think hes the same Crawford? I doubt it... Beating a fading 5'8 Alvarez who's little more than a juiced up MW himself isn't comparable to facing the likes of Sharkey, Schmelling, Risko etc.. who between them beat the likes of Louis, Wills, Loughran, Baer, Carnera etc.. ye they had plenty of losses, who didn't back then.
I meant that I'd pick the bigger versions of Bud as optimal for these matchups, not that he'd win. I see Schmeling clocking hi at some point, Sharkey I'd be less confident in considering he's struggles with Crawford-sized fighters.
So we're talking about a 168lb P4P no1 Crawford who systematic schooled P4P 185lb Alvarez versus 189lb Schmelling and 198lb Sharkey. Crawford's giving up 20lbs+ but he's a far far better boxer than both men, much faster, much better defence, complete infighting and outfighting. Given Walker gave Sharkey all he could handle, you'd expect Crawford to do a fair bit better. Schmelling is the harder fight and has the punchers chance. But if it goes the distance Crawford should outbox him.