Kentucky Derby winner Medina Spirit walks around the Stakes Barn with assistant trainer Jimmy Barnes after arriving at Pimlico Race Course on Monday. (Lloyd Fox/The Baltimore Sun via AP)

Maryland racing officials reached an agreement with trainer Bob Baffert on Tuesday to allow Medina Spirit and his other horses to enter races this weekend at Pimlico Race Course subject to extra testing and monitoring. If Medina Spirit, who failed a postrace drug test after winning the Kentucky Derby, comes back clean in test results expected Friday, he is likely to be the favorite to win the Preakness.

“We reached an agreement with Mr. Baffert and his lawyers that allows for additional testing, additional monitoring — essentially a watchlist to ensure the integrity of the sport leading up to the race,” Maryland Jockey Club lawyer Alan Rifkin said. “We’re very pleased to have that and we appreciate Mr. Baffert’s patience and the way in which his lawyers went about it.”

Medina Spirit, fellow Baffert-trained Preakness colt Concert Tour and filly Beautiful Gift, who is expected to run in the Black-Eyed Susan Stakes on Friday, are all subject to the extra scrutiny.

“Baffert has given these consents to further the interests of horse racing and the public,” lawyer Craig Robertson wrote in a letter to the Maryland Jockey Club. “The integrity of the sport is of the utmost importance to Mr. Baffert, and by consenting to this testing regimen and monitoring, he reaffirms his commitment and dedication to the sport.”

Kentucky Derby winner Medina Spirit is walked to be groomed after a morning exercise at Pimlico Race Course ahead of the Preakness Stakes horse race on Tuesday in Baltimore. (AP photo)

Medina Spirit drew the No. 3 post in a field of 10 horses for the Preakness as the 9-5 morning-line favorite. Concert Tour drew the outside 10th post and is the second choice in the wagering at 5-2.

Ram drew the No. 1 post at 30-1, Keepmeinmind the No. 2 at 15-1, Crowded Trade the No. 4 post at 10-1, Midnight Bourbon the No. 5 post at 5-1, Rombauer the No. 6 at 12-1, France Go de Ina the No. 7 at 20-1, Unbridled Honor the No. 8 at 15-1 and Risk Taking the No. 9 at 15-1.

Keepmeinmind and Midnight Bourbon are the only Kentucky Derby horses returning for the Preakness to challenge Medina Spirit.