He won the Kentucky Derby as a maiden in 1933 - and never hit the board again.
Broker's Tip won the KY Derby in 2:06.80 - the only other route race that day was a $1,000 claiming race with a $600 purse - the winner was a 4-year-old filly who ran 9fs in 1:53.80
That means the Kentucky Derby went just 8 Beyer points faster than a 1k claiming race won by a filly in workmanlike fashion.
You're dealing with a very similar time period when comparing 1933's form and charts with 1941's form and charts - and I think it's pretty safe to say Whirlaway would have won the '33 Derby by 25-to-30 lengths and do it under restraint.
The nicest thing you can say about the '33 Derby was that the pace was strong. 1:12 4/5 for 6fs - became 2:06 4/5 - meaning the final half mile was run in a trotter like 54 flat.