This is a self-published time travel novel with a baseball theme penned by Paul Runkel called Time for Baseball. I haven't read it, but one reviewer on Amazon has and he seemed to like it. Maybe it's really cool, maybe it's not, but either way, I thought I'd throw it out there so that you'd know it existed because a writer can always use a break.
Using his uncle's time machine, a fringe major league ballplayer travels 60+ years back in time to play for Chicago's National League team, the Barrons. Shortstop Jack Dillon and his uncle believe today's players are bigger, faster and more talented than their counterparts of the 1940s. Jack's goal is to alter the results of the 1946 pennant race by enabling the second place Barrons to edge out the first place Cardinals allowing his grandfather to win a large wager. With these winnings, grandpa will continue to own a computer company that will be worth billions of dollars by the year 2000. While in 1946, Jack falls deeply in love with a beautiful model and finds himself associating with a group of people who are threatened by a serial killer.
One baseball time travel novel I have read is If I Never Get Back by Darryl Brock and I recommend it highly.