A lot of photographer talk about ditching their Canon or Nikon DSLRs for something lighter and compact like the new mirrorless cameras. When I ask them if they will, they usually say they are trying out one as a third camera, but not their main camera. The sports shooters have an even lower adoption rate of mirrorless tech, they need super fast focusing and specialty lenses. I have a different perspective. I started out shooting with manual focus lenses and a camera that maybe shot five frames a second. We covered pro sports for the wire services with black and white film a darkroom and an analog transmitter with a manual typewriter for captions. Now if the camera and computer doesn't do practically everything for you, it is no good.
Actually, those little mirrorless cameras are AMAZING. My 2-year old Olympus OMD-e-m5 shoots 9 frames a second, has 5 axis image stabilization, and wicked fast auto-focus. I can't complain.
I just needed 2 camera bodies - the Olympus OMD-e-m5 and the Panasonic Lumix GX-7 and two lenses - a Panasonic Lumix 25mm f1.4 and the Olympus 12mm f2 - the equivalent of a 24mm and 50mm lens, to shoot the photos of cyclocross in Los Angeles' Griffith park. The real trick to make my photos look the way they do is use some small battery operated strobes, just 2 manual LumoPro 180's with PocketWizard radio slave triggers and small light stands that I can haul around the course and set up. I also had a small clamp that I used to attach my strobes to anything and everything. No assistant needed and I was easily able to hike around the course looking for the best angles without lugging around heavy equipment.