Kevin
When he was in high school, Kevin loved two things: baseball and girls. He loved the game of baseball itself, and he loved the attention and recognition he got from it from nearly everyone around him. It made him a star. He was never short on friends, or girls, when he was playing. And he definitely loved the girls, or maybe he just loved the fact that girls liked him, since he apparently had no trouble cheating on Beth even though he thought he'd been crazy about her. But everything changed one rainy night, and he discovered who really loved him in the aftermath as the friends and the girls fell away one by one.
Now, Kevin wasn't really sure that he even knew what love was. He knew there was much more to it than enjoying a sport or crushing on a cute girl. And looking back at how he acted with his family, friends, and the girls he'd dated, he realized that maybe his one true love had really been himself. Maybe he'd loved himself too much – to the extent that he hadn't left much room for anything else, or anyone else, and maybe that was partly why he'd been so miserable for so long after the accident.
He was learning, through a few metaphorical kicks in the rear, that it wasn't all about him. He was going to need to learn to open his heart, and that was going to make hitting a 90-mph fastball look easy.