Chris Speier has been Dusty Baker’s right-hand man for years now, and will manage in his place this weekend. (John McDonnell/The Washington Post)

For those who measure time in innings and games, Opening Days and Octobers, the following qualifies as a sign that everyone is getting old: Darren Baker, the precocious little batboy who had to be pried away from home plate in the 2002 World Series, is graduating from high school in Northern California this weekend.

His father will leave the Nationals to be there for it, and rejoin them when they get to San Francisco for Monday’s game.

Darren, who attends Jesuit High outside Sacramento, is committed to play at Cal next year, but is eligible for the MLB draft in June. He interned at the Nationals Youth Academy between his summer baseball schedule last year.

Bench coach Chris Speier will manage the team in Baker’s absence, as he did once last year and has in the past. Speier was Baker’s bench coach in Cincinnati, and managed when Baker left the team to deal with health issues in 2012. He managed the Nationals to a win last September, when Baker left because of a death in the family. He was drafted by the Senators when he was 18, and was one of Baker’s first calls when he got the Nationals’ job.

Baker generally plans his lineups a few days in advance, meaning he will probably leave Speier lineups to use in his absence, barring anything unexpected.

More baseball:

Roark and a four-run first is all Nats need to turn back Mariners

It’s officially official: Koda Glover is the Nationals’ closer

Pinch-hitting specialist Chris Heisey to have MRI exam for biceps injury

More Nationals | MLB news | Post Sports | Post Sports on Facebook