The ninth and final race is coming up at Gulfstream.
There are 25 live tickets in the Rainbow 6. Three tickets have a horse that is a single.
Those horses are Resident Liberal (5), Summer Beach (6) and Drillomatic (8).
A win by any of those horses would take down about $2.2 million--and spoil what Gulfstream has been hoping will be a huge Rainbow 6 betting day for Sunday's mandatory payout.