Blum, progressing back to the active roster after suffering a broken finger on July 24 against the Rockies, speculates it will take him two more weeks to get back healthy.
"It felt good," he said. "I can't speed up Mother Nature, but I'm doing the best I can."
Blum fractured his right pinky finger fielding a ground ball and was forced to the disabled list for the second time this season.
In addition to continuing a lower-body workout Monday, the veteran took ground balls and fungoes from D-backs third-base coach Matt Williams.
"I've been doing a lot of conditioning and stuff like that to stay in shape and do the things that I can," Blum said. "Obviously, I can't swing a bat, but hopefully here in about a week and a half to two weeks, I'll be able to do that."
D-backs manager Kirk Gibson said Blum is scheduled to have another X-ray in around a week's time.
"We'll get a better idea on when he can start to move it then," Gibson said.
Blum is hitting .200 (3-for-15) in seven games this season.