I was with trwi in feeling like this was pretty cringey. Now that I've read that some teammates came up with the idea, I feel better about it.
Here's why I was on trwi's side in thinking this was kind of embarrassing. Let it be known that, of course, I think very highly of Yelich like everyone does and get sentimental about sports just like anyone.
But the timing was really weird. The organization and fans are leaning into the emotion and sentimentality of this regular season REALLY hard, and making a huge deal out of making Yelich captain right before the playoffs after he's had an awful season really smelled like a "pity pat on the head" to me. This has become such a big deal for some reason. And OBVIOUSLY I love Robin Yount, but running it by him first made me roll my eyes.
If it was before the season started, like when we read who the Packers captains are, then totally cool! Makes perfect sense. Team leader is the captain, awesome. But it really felt like it was a way to make him and everyone feel good about him being a drag on the lineup while the team is having its best regular season ever.
Again, I love Yelich as much as the next fan and am fantasizing about him walking it off to win the World Series. That this came from his teammates reduces the cringe factor significantly.