As the Mariners round third base and head home — the end of the regular season Sunday — it’s worth looking ahead instead of backward.



The whole point of the team’s rebuild is putting some distance between the team’s mediocre-at-best past and what the team hopes will be a brighter future in 2020 and beyond.



Many of the rebuild’s major moves are done after general manager Jerry Dipoto made a multitude of deals last winter that bolstered the team’s farm system with intriguing prospects, so don’t expect a lot of big-name additions in the offseason. Dipoto won’t be as active as he was a year ago when he traded away James Paxton, Edwin Díaz and Robinson Canó, among others, but he won’t sit on his hands at all, either.



“We don’t expect we will go into this offseason and be scouring the free-agent market at the top end of the food chain,” Dipoto said. “We understood this...