1.) Ryan Goins is going into his age 27 season. Position players peak around 25. lol
2.) You don't understand defensive numbers. They are skewed by chance and variation until a suitable sample size is reached, just like any other stat. Just because they happened does not mean they are likely happen again. If you look at Goins' skill per chance (UZR/play), he's closer to Starling Marte than anyone else in terms of defensive skill. Goins is near the top in opportunities (Plays/Inning), which skews his insane UZR, as it's an accumulated stat (even UZR/150 doesn't help this as some players get more Plays per Game which would skew that, making UZR/play the most effective). He's really not close to "top tier defenders" like Machado and Simmons whose numbers you seem to believe he can reach, even with the insane numbers he's posted that so far hasn't been enough to keep him employed. To somehow think he'll make another significant jump, at 27, based off of a gut feeling or GruberProjections or whatever you've got going on in there, is just... sigh.