True. But in making projections you have to look at other factors in addition to age. Unusually high BABIP (relative to line drive rate) for example would suggest regression risk. See Chris Johnson of the .394 BABIP in 2013. Btw Inciarte's BABIP last year was .329. So much less regression risk from that.
Maybin is not an old man.. he is only 28.. so I don't think you can throw age at either player.. however, maybin had a great 1st half last year and a putrid 2nd half. So I say is who he is.. a .260 hitter with maybe 10 to 15 homers.. I think you can look at Ender and say on the safe side you should be around a .280 hitter with a high OPB and around 5 -10 homers.. that may not seem huge but it is when you factor the OBP and far fewer K%.
here is Maybin's profile...
Profile: It was a tale of two halves for Maybin in 2015, as he posted above-average offense in the first half, and followed that with putridity the rest of the way. His walk rate took a dive in the second half, going from 9.3% to 6.6%. He’s moving to the Tigers outfield for 2016, and there is no guarantee of a full-time role for him. He’ll likely be platooning with Anthony Gose and Tyler Collins, barring any other moves by the Tigers before the season gets underway. It will be interesting to see how the Tigers use him, as he didn’t have much of a platoon split in 2015. His patience against lefties is much better, as his 13.1% walk rate against southpaws dwarfs the 6.5% BB% he shows against righties. In his career, his weighted offense is actually higher against right-handers, but reverse splits are tough to believe in without huge samples. He was basically even last year, but that was buoyed by the increased walk rate. Don’t pick him up to be the short side of a platoon, even if that’s how the Tigers deploy him, as the numbers against lefties aren’t stellar. He cracked the 20-steal mark for the third time in his career, and should be good for another 15-20 in 2016, but that's about the best thing you can say about him. (Darren Schienbein)
here is Enders from fangraph..
Profile: Inciarte wasn't a big-time prospect or expected to develop into the player he has been the last two seasons, but he turned out to be one of Arizona's most valuable players. He played all three outfield spots incredibly well, which increases his overall utility. He was expected to be in a platoon with pitcher-turned-outfielder David Peralta, but Inciarte's production was so good, the Diamondbacks had to find a spot for him. He played mostly right field because Yasmany Tomas had a disappointing first season. He also picked up in center field when A.J. Pollock missed some time. His skill-set at the plate is about contact, so he doesn't hit for a lot of power -- and probably never will. Even his 2015 produced just a .105 isolated slugging percentage, but he was able to be productive in other ways. He used his speed to get on base when he hit the ball. He had the sixth-best contact rate in the majors and produced a 52.4% ground ball rate, good for 20th in the majors. He also spread the ball around the field, almost equally sending balls in play to the center, pull, and opposite fields. He was traded to the Atlanta Braves along with Dansby Swanson and Aaron Blair for Shelby Miller. Unless he's traded again, he could be one of the Braves' most productive players this side of Freddie Freeman. He's also slated to be their starting center fielder and, presumably, hit near the top of the lineup. (Dustin Nosler)
I know which offensive guy I would want.. what about you guys..