When an ex-major-league pitcher travels back to Ireland to reunite with his greatest love, he discovers she is terminally ill with a 10-year-daughter who is actually his.

Don't give away the whole movie in the logline.

Is the fact that he used to play ball relevant? Is he going back to Ireland specifically to find her?

When a major league pitcher retires and returns to Ireland to find what he thought was his greatest love, only to find so much more.

"When he's released from the team, a major league picture travels to Ireland to find the-one-that-got-away only to discover she has terminal cancer and he only has one chance to make amends."

Let's up the ante: a former womaniser who has had a vasectomy.
She wants him to bond with her daughter before telling him that he is the father.