Several intriguing races on Friday's Maker's 46 Mile undercard

Besides the Grade 1 Maker’s 46 Mile, a 10-race Friday card at Keeneland includes a number of interesting preceding races.

In race 2, Union Jackson is a 4-5 morning-line favorite in a classified allowance sprint after earning Beyer Speed Figures in the 90s in four of his five career starts.

In race 7, Apologynotaccepted makes her first start for trainer Bill Mott after Happy Alter sold a partial interest in the 5-year-old mare to Gary Barber following a 16-length debut victory in which she earned a 96 Beyer on March 11 at Gulfstream Park.

And in race 8, the first one-mile dirt race with as many as 12 horses ever run here will be contested under second-level allowance conditions. A one-mile dirt race was run for the first time at this spring meet Wednesday, albeit with just seven starters.