"He had a family matter come up where he had to go home for a few days," said Padres manager Andy Green. "I think him and his brother both went home. He'll miss this series, be back with us in St. Louis."
Upton has arguably been San Diego's most electric player this season, with three robbed home runs, a walk-off homer of his own and a straight steal of home. He is hitting .262 with 16 home runs -- the most he's had since 2012 with the Rays -- and 20 stolen bases through 87 games.
Baumann's promotion comes one day after the team traded Drew Pomeranz to the Red Sox. The 28-year-old has thrown 17 innings for Triple-A El Paso this season, posting a 1.06 ERA out of the bullpen. Baumann struck out 17 batters while walking eight, and he has been particularly effective against left-handed batters, holding them to a .080/.179/.080 slash line. Righties have hit .226/.351/.323 against him.
With Baumann likely moving into San Diego's bullpen, Paul Clemens could take Pomeranz's spot in the starting rotation. When Clemens was acquired from the Marlins on June 28, Green said he could be used as a starter or a reliever, depending on what was needed.
Clemens started two games for the Marlins, posting a 6.30 ERA over 10 innings, but he has been exclusively used out of the bullpen in his time with San Diego.
Spangenberg possibly out for the season
Padres second baseman Cory Spangenberg re-tore his left quad muscle while running July 8 and will be out at least six additional weeks. Spangenberg has seen multiple setbacks throughout his rehab, and the latest news means there is a possibility he won't see the field again this season.
"Spangy's [injury is] bad news," Green said. "It's been a really rough year for him when you think about it. We kind of had high hopes for him to be starting the season off in the two-hole for us.
"He kind of re-tore his quad again, to a point where [he's out] six to eight weeks. Potentially, the rest of the season's over for him. It just takes time to find out what he's capable of doing, but it's going to be a slow process."
After Spangenberg's first setback May 17, Green was optimistic that Spangenberg would be able to return to the team around the All-Star break. Spangenberg played just 14 games with the Padres this season before injuring his leg after sliding into first against the Pirates on April 19.
Ross recovery delayed with ankle sprain
Opening Day starter Tyson Ross tweaked his left ankle Wednesday while doing exercises in his hotel room, and after undergoing X-rays and an MRI, he was diagnosed with an ankle sprain.
Green said the injury would delay his rehab process "a couple of weeks" since he won't be able to throw off a mound until the ankle has healed.
"Until he gets the stability underneath him, he can't really progress with [side sessions] and live BP," Green said. "So, [we] hate that. I really don't have a day to say when Tyson will be back.
"He feels good. His shoulder feels great, which is the most important thing. Just getting that ankle right now."