Kris Bryant is listed at 6-foot-5 and 230 pounds. He is probably a few pounds heavier than that. He was the second selection in the 2013 draft. He spent his brief time in the minor leagues playing third base.
Bryant was kept in the minor leagues by the Chicago Cubs long enough in April 2015 to avoid getting a full season of major league service. He started 136 games at third base and 10 in the outfield for manager Joe Maddon last season.
Maddon has pushed Bryant (and other Cubs) toward versatility in 2016. Entering this weekend, Bryant has started 62 games at third base, 27 games in left field, 11 games in right field and three at first base.
There were some skeptics that this moving around could have a negative effect on Bryant at the plate.
Not so you would notice it. A year ago, he had 26 home runs and 99 RBI in 650 at-bats. He now has 26 home runs and 68 RBI in 401 at-bats.
Miguel Sano is listed at 6-foot-4 and 260 pounds. He actually weighed in at 278 pounds for spring training, and he's still probably closer to that than 260.
So, yes, Sano has a thicker body than Bryant, but he runs OK, throws very well and has athletic skills.
The Twins tried to put Sano in right field to start the season. This was decried as a blunder by most observers, and the 37 games Sano started in right field indeed provided numerous adventures.