The phrase "after he split" is correct and usable in written English.
It can be used to refer to an event or action that occurred following someone's departure or separation from a situation or relationship.
Example: "After he split from the band, he pursued a solo career that gained significant popularity."
Alternatives: "after he left" or "after he broke away".
In 1970, a heartbroken Hockney fled to Paris after he split with his boyfriend, artist Peter Schlesinger.
But after he split the nail in the first inning, he had to file it down, and that meant he could not get the feel he normally has.
Joy Williams, 69, lived with dentist Norman Martin for 18 years after he split with his wife, Maureen, with whom he had twin daughters.
Callahan and Rick Nash assisted on Stepan's goal, which came after he split the Winnipeg defense and snapped the puck past goalie Ondrej Pavelec.
But her greatest professional affiliation in Hollywood was with Jerry Lewis; she worked on about 10 of his films after he split with his longtime partner, Dean Martin.
But after he split with his previous girlfriend, Monica Ward, and was sentenced to four weeks in prison in 2010, after he lost his appeal against his conviction for assaulting her, he found himself reconsidering.
A more significant change for Kemp may have been in his personal life: after last season, he split up with the pop star Rihanna after a year of dating.
After a while, he split the riders into three teams to race one another, almost entirely uphill, to a finish line about thirty miles away.
He met the 17-year-old Patty Beedon in 1968, but after two years he split with her and married Marietta Boeker.
But soon after the defeat, he split not with Mauresmo, but with Dani Vallverdu, his long-time assistant coach and hitting partner, and his fitness coach, Jez Green.
After they separated he split his time between his mother's home in Westchester County and his father's apartment on the Upper East Side of Manhattan, not far from the studio in which he now lives.
