The Giants placed second baseman Joe Panik on the 15-day disabled list with lower back inflammation, the team announced Monday afternoon.
Panik did not play last Tuesday and Wednesday vs. Milwaukee because of the ailing back.
He returned to the lineup on Friday and went 1-for-4. On Saturday, he delivered two hits and an RBI, but was unable to play on Sunday.
Panik talked to reporters after the game and said a day of treatment didn't help. "It's not getting any better," he said. Panik definitely looked down, and he said he was "frustrated" by not being able to get out on the field and help his teammates. He doesn't know what comes next because he has never dealt with a back injury, but it seems likely that the Giants will send him for tests at some point. The hope is that he's back on the field in a day or two, but you just never know with the back.
The Giants purchased Kelby Tomlinson's contract from Triple-A Sacramento and added him to the active roster.
Tomlinson will be seeking his Major League debut. The 25-year-old rookie has split the 2015 campaign between Double-A Richmond and Triple-A Sacramento, combining to hit .321 with 19 doubles, four triples, three home runs and 43 RBI in 97 games.
He has also gone 21-for-30 in stolen base attempts.
He was in the Giants' big league camp this spring for the first time in his career and was drafted by San Francisco in the 12th round of the 2011 draft.
San Francisco Giants media services contributed to this report