Proper diagnosis and any treatment method could help athletes, I don't think there is anything in particular with Mr. Tan's work that would be more helpful. I've heard somewhat mixed reviews of his methods from colleagues with more experience than I have, but admittedly I personally have only marginal understandings and minor clinic experiences of his work so can't offer much.
There are a multitude of sub-systems within the world of acupuncture, so it never hurts to explore these and see both what clinical results arise and how comfortable and excited you get when using these systems. His book, acupuncture 1,2,3 available at his website, is the place to start. At the end of the day what matters most is results and results that last without overly frequent treatments or the need for consistent treatment (in the cases where that is possible of course).
Athletes in particular need very specific work and I would imagine a system that doesn't also utilize tuina and ashi needling, my bias admittedly, wouldn't be very helpful for them. But for another approach to needling his techniques are worthy of exploration. As are the systems of master tung and many of the Japanese sub-systems such as those explored in "hara diagnosis: reflections on the sea". A specific japanese text worth exploring if your interest is sports acupuncture is - "sports acupuncture, the meridian test and it's applications".
Personally, I find more depth of technique and maneuverability so to speak in many of the Japanese systems, but I also have more technical and clinical experience with them as well so I am biased.
I'd be curious if after reading his work and/or attending his seminars what you find clinically if you do adopt his techniques.