Quite a few football pictures from last season 2014 and this season 2015 -- around 3000 or so clicks with at least half under stadium lights. I also use it for taking equine events...I'll post a couple of those too later on. Don't ever think "I can't do action with Pentax". Of course the High School level stadiums leave a lot to be desired as for lighting, but this camera and lens combination are more than adequate if you employ some good techniques.
K-5iis
ISO 6400, f2.8, 1/320
myFlickr
ISO 1600, f4, 1/2000
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ISO 1600, f5, 1/1250
myFlickr