A mom with only 7 rating means the team was doing bad, not that he was playing good.
No, the 7s are the latest rates. He got 8 when he got MoM.

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I would get 2nd guy to Q 59 and then sell him
Yes, one of them gonna be sold in the last days of the season but I don't want to spend extra green packs just to raise the price. I have some boosters but I prefer to use them on the player I 'm gonna keep the next season. That's why I 'm in a hurry to decide who gonna keep.