Lucky for CEP, we had a couple that loved the Reds so much, they had a Reds themed wedding. Amanda + Mike were married on the field and had the reception at Great American Ballpark. One of my favorites touches was a custom made jersey with the couple's last name which they used as the "guest book."
While browsing Etsy (so addicting!), I found adorable baseball themed wedding invitations. Really, how cute are these?
Cufflinks in your favorite team (or find them with just the baseballs) for all of the men.
Cooperstown Cookies has great options for sweet treats- including a plain baseball cookie or a bag of mini bunt cookies for your guests to take home.
Or try baseball cake pops like these cute ones I found on Etsy!
Adding a few unique touches without going overboard can really pull a themed wedding together. Check out this table by Camargo Rental also in honor of opening day, while it might not be elegant enough for opening day (ie pilsners + popcorn), but it definitely shows a little can go a long way when working with a theme.