[1] After twelve years of success, he finally won the Irish Derby with The Other Toss in 1990.

[2] O'Donnell successfully defended the title in 1991 with Ardfert Mick [3] and joined the exclusive group of English/Irish Derby winning trainers with Farloe Melody in 1992.

[5] He was based in Killenaule, County Tipperary,[6] and amassed 22 Classic winners.

[7] After retiring from training he assisted his wife Frances, who took over the licence; in 2012 she won the Irish Derby.

[8] Before he trained greyhounds he owned a milk delivery business and a haulage firm.