The issue here is ... if you turn slightly to get another shot, you're looking at a different light (maybe your auto WB made a bad judgement call) and get a color cast in that shot. Green casts are often from fluorescent lighting. This can happen all the time and does happen to all of us. Best thing, you got the shot and it can be fixed with a little post computer work. For very simple adjustments, you could also try a photo filter in Photoshop to correct the green cast, but it's a down and dirty fix with no real exact correcting but it will look better.

Do try the Photoshop fix I posted above using blend mode/divide. It really can fix any tinted shot ... as long as you have one spot in the shot that should be pure white (any blown sparkle of light will do to work off of). Most versions of PS can do this. Watch the video and see for yourself. It's amazing. Even if you don't have Photoshop, watch the video and see what professional software can do. But do understand that when you get into color correcting work, you need to calibrate your monitor first so your viewing true colors in the first place.

Here are the details of these I shot a few hours ago. There has been NO processing of any kind other than converting the RAW to jpg and reducing the file size to 2040 on the long side. They were also shot in HS burst mode so they were within fractions of a second apart - I think the Canon 1dx2 shoots around 14fps in raw.
Canon Lens= 70-200 II IS @F2.8; AI Servo; sp-640; 115mm; WB =3900 k; EC +1/3; meter =CW ave.

The 1st shot (A) represents pretty close to the actual pale green wall color. What do you suppose would cause the shift in (B) to light tan? I shot a burst of 8, all within a sec & the color changed on every other shot. Could it be some fluorescent flicker?

Burkphoto nailed this....

"Two different light sources running on different phases of three phase power will oscillate color with offset patterns.

It is almost impossible to avoid this effect if A, B, and C power phases are all in use in the same lighting grid! That puts three different color/brightness variations into the same scene, sequentially."

Another compelling reason I only shoot outdoor soccer... either you control illumination or it controls you...

lovely series raymondh... B&W can often be pressed into service in this scenario...

Burkphoto nailed this....

"Two different light sources running on different phases of three phase power will oscillate color with offset patterns.

It is almost impossible to avoid this effect if A, B, and C power phases are all in use in the same lighting grid! That puts three different color/brightness variations into the same scene, sequentially."

Another compelling reason I only shoot outdoor soccer... either you control illumination or it controls you...

lovely series raymondh... B&W can often be pressed into service in this scenario...