A trio of graded grass stakes on opening day at Santa Anita ended in upsets, led by the 12-1 surprise of Ambaya in the $300,000 American Oaks (G1).

For the third straight year, Bob Baffert won the Santa Margarita (G2) with a big, front-running daughter of Uncle Mo.

Unraced since his victory in the Breeders’ Cup Juvenile (G1), last year’s divisional champion Citizen Bull picked up right where he left off in Saturday’s Robert B. Lewis (G3) at Santa Anita.

An upset appeared to be brewing in Saturday’s Joe Hernandez (G2) when the 12.90-1 Sumter kicked away from the 9-10 Motorious down the Santa Anita stretch.

CJ Thoroughbreds’ Hang the Moon is getting the hang of pulling upsets in major turf races.

In a thrilling battle down the Del Mar homestretch, up-and-coming sophomore sprinter Raging Torrent got the better of California-bred sensation The Chosen Vron in the $251,500 Pat O’Brien (G2).

The Churchill Downs spring meet wrapped up on Sunday with an action-packed card featuring five listed stakes.

The result of Sunday’s $400,000 Sunland Park Derby (G3) at Sunland Park was never really in doubt, as 6-5 favorite Stronghold looked like a winner throughout and delivered on expectations.

The graded stakes action at Santa Anita got off to a formful start on Tuesday, courtesy of odds-on favorites Anisette and Easter, respectively, in the $300,000 American Oaks (G1) and $200,500 San Gabriel (G2).

Trainer Chad Brown reiterated his prowess training female grass horses by saddling the top four finishers in Sunday's Matriarch (G1) at Del Mar.