ATG question

YardGoats

So I somehow lucked into getting Jackie Robinson again this past weekend. Can anyone tell me what the 4122 ATG (circled in red) means? Is that just xp saved that I can use on him if I go to gold or is it something that was available in previous games and isn’t used this year. Thanks for the help! 

ShoveItUpYoenis2

The second one, used in previous years not this year. Glu too lazy to remove. CS just forwarded “to the relevant team”