When a movie is really good, of course lots of people are going to tweet similar things about it. But when two famous people are getting paid to let a PR guy tweet an endorsement for a mediocre movie from their accounts, they might tweet literally the exact same thing.
That seems to be what happened to Mike Trout and Robert Griffin III today. Either that, or they both really loved Marlon Wayans' hilarious movie A Haunted House 2 (which currently has a rating of 13% on Rotten Tomatoes).
UPDATE: Looks like the same PR person works with LeBron: