You can listen to the Grateful Dead for the songs, or you can listen for the jams. I love the songs as songs, but the Dead do not always do their own material much justice, especially when it’s time to sing a three-part harmony. The jams are less immediately accessible, but it’s what the band does uniquely well. I especially like “thematic jams”, as the gloriously obsessive Grateful Dead Guide calls them. These are spontaneous quasi-compositions like The Beautiful Jam. Sometimes the themes recur across multiple shows, even across multiple years, and eventually become the basis of new songs. My favorite recurring theme is called the Mind Left Body jam. It’s important enough in the lore that it has a Dead cover band named after it.
Here’s an hour-plus-long MLB jam supercut, with identifiers and timestamps in the description.
If you would rather listen one at a time in chronological order, the invaluable Save Your Face Blog has an exhaustive compilation of neatly edited MLB jams.