O boy you are bouncing around. You have more options then you can handle. It also looks like you think that you will have the camera for all the seasons that your son is going to play. Well that is optimistic and maybe not very good thinking businesswise. Look at your camera as you look at your car. There is an economical factor to it where you reach a point that taking a write-off and replacing it would be far more economical. So you need a plan. What do you need in the long run as a setup for your gear? How do you get to that point? Are you going to miss in the meantime some wonderfull oppertunity's that you can't take images off because you haven't bought the lens for it yet. I do see some stretching in your budget, that is Always a good thing. Maybe it is a good weekend to give your wife some flowers
On the sports question: Is your son playing in daylight or are we talking about some dimm light on a regional sportsfield in the winterevening? With daylight you can do a lot with more lenses. With dimm light I would suggest the K-5ii(s).
One other option is the K-50 wich is also an excellent camera and maybe a budget saver. Maybe you can buy two lenses or just one you really want.
I only do landscapes once in a while, so I use whatever is in my hands for that. This one with the K-01 (same IQ as the K-50 with 16mp 12-bit processing) and the FA*85mm:
This is with the K-5 and the DA*60-250mm at 250mm, wich is a better lens then the Sigma, but f4:
A portrait with the K-5 and DA*55mm:
A visitor at my doorstep with K-01 and 40mm ltd.:
Just think off what you want and start buying that and not lenses you don't want in the long run.