Zeller’s safety bubble was pierced two Wednesdays ago, when the Spurs called to offer him a job. With seven-time All-Star LaMarcus Aldridge declared out of the NBA’s restart in Orlando, Fla, because of shoulder surgery, the Spurs were in search of a tall, warm body to help fill out their frontcourt rotation. A career-long journeyman who has not appeared in an NBA game since April 2019, the 30-year-old Zeller checked the most important box in the Spurs’ hunt. He was available. “It’s been a whirlwind, but it’s been fun,” the 7-foot Zeller said. “I’m just trying to get used to the new coronavirus protocols. Just happy to be back, playing basketball, back on a team, especially a great team like the Spurs.”