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He reached the last 16 of the 2013 BDO World Masters after a controversial win over Richie George, when his winning dart at double 10 did not actually hit the target, but referee Nick Rolls called 'game shot', ending the leg and giving Searle the match.

In 2016, he finished second on the PDC Challenge Tour Order of Merit, thanks to winning two events along the way, which meant he automatically gained a PDC Tour Card.

In the PDC, Searle reached the fourth round of the World Championship on his debut in 2019, then the third round the following year where he led Gary Anderson 3–1 but was eventually defeated 3–4. The next season, Searle won his first Pro Tour title by beating world number one Michael van Gerwen 8–6 in the final of event 3.

Searle made his first appearance in a PDC major quarter-final at the 2021 World Grand Prix, following victories over Dimitri Van den Bergh and Luke Humphries. He lost to Stephen Bunting in the quarter-finals, by a score of 3–1 in sets.

Searle hit a first televised Nine-dart finish at the 2023 Grand Slam of Darts in a final group match victory over Nathan Rafferty.

In January 2024 it was announced that Ryan's had left Loxley Darts at the end of his 3 year deal, shortly afterwards it was announced on the 17th January that he had signed with Harrow darts which coincided with the release of his new signature darts, shirt and merchandise. The same year, he was one of the participants on the Masters. However, he lost in the first round to Dirk van Duijvenbode.

On the 2024 PDC Pro Tour, Searle was runner-up in Players Championships 1 & 2, losing to Luke Littler 8–7 and Gary Anderson 8–5 in the respective finals. The following week at Players Championship 3, he defeated Anderson 8–7 in a repeat of the previous event's final to win his first event in a year.