Carol,
The last shot looks better but it still seems pretty "hot" to me, meaning it's blowing out the whites a bit too much. Look at the ball and his hand - they almost look nuclear (BTW, if anyone has read another current thread regarding exposure and image sharpness, here is the only time missing the exposure will kill image sharpness - look at how mushy his hand looks and how there is almost no definition in the fingers or the ball. Granted, some of this could have been the result of it being outside the depth of field, but when you blow out a portion of an image like this all sharpness goes away).
Even in the shadows there isn't much detail in his uniform.
It also kinda looks like you overused the "highlights and shadows" tool in PhotoShop or similarly pushed the image's tone curves. The facial exposure looks a bit too light.
The thing about in-camera metering (employed when shooting Av or the other program modes) is it can be fooled really easily. To some extent you can take charge by dialing in some exposure compensation (how I shoot most day baseball, FWIW) but when the light is like this, you're best off shifting to manual exposure.
To gauge your exposure settings for manual, try selecting Av and shoot the grass (in the sunlight), filling the entire viewfinder with the grass, and then change to manual and add 2/3 to 1 exposure to settings you got in Av. Another option is to take a shot of your hand (again, in the same light as the subject is in) and see how this works. You might still need to add up to one EV of exposure.
Watch the highlight blinkies and your histogram.
Honestly, I can't remember the last time I even noticed what my in camera meter was indicating. I judge almost all my exposure with the histogram, highlight blinkies and seat of my pants. You can accept some level of highlights being blown, but I'm guessing you're still 1/3 to 2/3 too hot on this shot.
Be advised that even the histogram can be fooled. There is a lot of dark in this shot (similar to what you get when shooting night football with a flash) so even a properly exposed shot is going to be shifted left of center a bit.
Below is the overall image histogram (on the right) and on the left is the histogram of just the player (you can't get this second one with your camera - I got it by going into PhotoShop and magnetic lassoing the player then displaying the histogram). See the difference? The right one almost looks OK, but the graph of the player on the left shows a lot of clipping at the far right hand side.
Overall, though, I'm picking nits a little. Your second shot isn't bad, but it could be a little better if it were exposed a little lower and gently recovered in post.
Hope this helps.
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