For all the comments about Valdez' ability with the bat (and they're probably very well founded), for some context.
Valdez
22 at A+ had a 119 wRC+ (Grissom had a 146 at age 21)
22 at his first shot at AA it was 130 (Grissom was 147).
At 23 in his second shot at AA Valdez was 178 (Grissom at the end of his 22 season put up a 121 wRC+ in Atlanta)
At 23 and 24 in AAA Valdez put up 92 and 118 (Grissom at 22, in a park geared toward pitchers, put up a 135).
This isn't necessarily to try and complain about Valdez. It's more just to say that I don't think people are paying enough attention to how dominant of an offensive force Grissom has been at every level of the minors, and being very young for the league at every stop of the way.
He is very good, and we should be very excited to have him.
You can also do it this way (by wRC+):
A+ ball: 119, Valdez, age 22. (note: delay year due to 2020.)
A+ ball: 195, Grissom, age 20
A+ ball: 146, Grissom, age 21
AA ball: 130, Valdez, age 22.
AA ball: 178, Valdez, age 23.
AA ball: 147, Grissom, age 21.
AAA ball: 118, Valdez, age 23.
AAA ball: 98, Valdez, age 23.
AAA ball: 118, Valdez, age 24.
AAA ball: 135, Grissom, age 22.
MLB: 102, Valdez, age 24.
MLB: 121, Grissom, age 21.
MLB: 78, Grissom, age 22.