Daily Racing Form's Jay Privman reported Instilled Regard is now in line to compete at Churchill Downs in Louisville, Kentucky.
Gronkowski discussed the news on his Twitter account:
Gronkowski the horse picked up a pair of victories last month, winning a Kentucky Derby condition stakes event on March 7 before finishing first in the Burradon Stakes on March 30.
Trainer Jeremy Noseda previously told Racing Post's Jon Lees that Gronkowski had suffered a "minor setback" and his team would take the next day to determine whether the colt would be healthy enough to run the Derby on May 5.
The New England Patriots tight end announced April 18 he had purchased a stake in the horse.