The number in brackets after his name — that (5) — is actually a significant detail for anyone betting or watching. It means Mortensen claims a 5-pound weight allowance, a concession given to less experienced riders to help them compete against seasoned professionals. Trainers will actively seek out claimer riders like him precisely because that weight advantage can make a real difference in a close race, so his 62 rides this season is a genuine vote of confidence from the yards putting him up.
His most consistent relationship is with trainer Scott Dixon, for whom he has ridden 36 times — more than half his total rides. Two winners from those 36 is a 6% win rate, exactly matching his overall record, which suggests Dixon trusts him enough to keep booking him even when the winners are not flowing. That kind of loyalty between a trainer and a young jockey is how careers get built.
The one area where Mortensen's numbers genuinely stand out is on wet or soft ground, where he has won 1 from 8 races — a 12% win rate, double his usual figure. One win from eight is a small sample and should not be overstated, but it is a thread worth watching. Some jockeys simply ride more confidently and sympathetically when the ground is testing, and if that pattern holds, it could become a genuine edge as his career develops.
Three years in, 62 rides in a season,
| Course | Races | Wins | Win rate |
|---|---|---|---|
| Wolverhampton | 17 | 1 | 5.9% |
| Southwell | 8 | 0 | 0% |
| Newcastle | 7 | 0 | 0% |
| Brighton | 5 | 0 | 0% |
| Lingfield Park | 4 | 0 | 0% |
| Kempton Park | 3 | 0 | 0% |
| Doncaster | 2 | 1 | 50% |
| chelmsford | 2 | 1 | 50% |
| Nottingham | 2 | 0 | 0% |
| Newbury | 2 | 0 | 0% |
| Great Yarmouth | 2 | 0 | 0% |
| Newmarket | 2 | 0 | 0% |
| Ffos Las | 1 | 1 | 100% |
| Epsom Downs | 1 | 0 | 0% |
| Redcar | 1 | 0 | 0% |
| Windsor | 1 | 0 | 0% |
| Leicester | 1 | 0 | 0% |
| Bath | 1 | 0 | 0% |