The trifecta paid a little over twice as much as the exacta, so including SL really wasn't a bad idea, especially if you thought the 1-2 finishers were the most likely to run 1-2.
Personally, I boxed the exacta & the tri & hit them both using only those 3. I've basically given up on SL, but I still wasn't sure enough to toss him because of the projected hot pace. I played all 3 in front & back DDs, but at the odds I had to throw a win bet on Fierceness & added an extra DD with Fierceness & the 14th race winner.
Basically the Travers made my day, in part because SL finished 3rd.