The anticipation for Mastery’s racing future came crashing down when the undefeated son of Candy Ride sustained a career-ending injury in his final victory. But the young stallion appears to also be highly anticipated as he starts his second career this month at Claiborne Farm.

Mastery, winner of the Grade 1 Los Alamitos Futurity as a juvenile, improved his career mark to 4 for 4 by winning the Grade 2 San Felipe Stakes by 6 3/4 lengths early last year. However, he was pulled up past the wire with a condylar fracture, and subsequently retired to Claiborne.

As Kentucky breeding sheds open this month, Lane’s End faces the challenge of reintroducing a young stallion to breeders.

Rainbow Heir, a recent winner of the Gulfstream Park Turf Sprint Stakes, has been retired from racing and will begin his stallion career at Ocala Stud in Ocala, Fla., during the 2018 breeding season for an advertised fee of $3,500.

Texas Chrome, who has been named 2017 Texas-bred horse of the year, will enter stud this season in Arkansas, his owner, Danny Keene, said Wednesday.

Texas Chrome also was the Texas-bred horse of the year for 2016. He retired last year after becoming just the second Texas-bred Thoroughbred to reach $1 million in earnings, behind champion Groovy.

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Grade 2-winning turf sprinter Green Mask will spend his post-racing life at Old Friends Equine Retirement in Georgetown, Ky.

The 7-year-old Mizzen Mast gelding was retired in September after fracturing his left front sesamoid during a turf breeze at Belmont Park. He was in line to be one of the favorites for last year’s Breeders’ Cup Turf Sprint prior to the injury. He underwent surgery at the University of Pennsylvania’s New Bolton Center, conducted by Dr. Dean Richardson.

It is inevitable that a $16 million race with a $7 million first prize would have an outsized influence on sire lists. Last year, Arrogate’s victory in the inaugural Pegasus World Cup, quickly followed by the $6 million first prize for the Dubai World Cup gave Unbridled’s Song an unassailable lead for the 2017 sire championship.

Neolithic, a multiple Grade 1-placed runner, has been retired from racing and will enter stud at Pleasant Acres Stallions in Morriston, Fla., during the 2018 breeding season.

The 5-year-old son of Harlan’s Holiday finished his career with three wins in 12 career starts for earnings of $2,278,028. He finished second in the Grade 2 Fayette Stakes and Grade 3 Discovery Stakes, but he made the bulk of his money running third in the Grade 1 Pegasus World Cup Invitational Stakes and Woodward Stakes, along with another third in the Group 1 Dubai World Cup in the U.A.E.

Quality Road got an exclamation point on his breakout season Thursday night, when two of his daughters were honored as Eclipse Award champions. The young stallion’s emergence at stud is a credit to the program of his breeder, the late Edward P. Evans, whose legacy is continuing in more ways than one.

Valiant Minister, once the most expensive graduate of the Ocala Breeders’ Sales Co. June 2-year-olds in training and horses of racing age sale in the auction’s history, has been retired to Bridlewood Farm in Ocala, Fla., for the 2018 breeding season, where he will stand for an advertised fee of $2,500.

The 5-year-old son of Candy Ride sold to Charles Chu of Baoma Corp. at the 2015 OBS June sale for $680,000 to top that renewal and earn the sale’s highest-ever price until the bar was raised once again the following year.

A Shin Forward, a Group 1 winner and sire in Japan, will relocate to Rockridge Stud in Hudson, N.Y., for the 2018 breeding season and will stand for a private fee as property of the horse’s breeder, Vivien Malloy’s Edition Farm.

The 13-year-old Forest Wildcat horse began his stud career at Lex Stud in Hokkaido in Japan. He has sired three crops of racing age, with 11 winners and progeny earnings of $501,048. His most successful runner is Center Forward, a winner in four of his 17 career starts.