He shares the award with D-backs right fielder Justin Upton, who led the Majors with 11 RBIs, 27 total bases and a 1.000 slugging percentage.
It is Maybin's first career weekly honor.
Maybin notched 14 hits and batted .538 (14-for-26) while also scoring eight runs. He posted an on-base percentage of .556.
On Sunday, the 24-year-old set a franchise record by swiping a base in his sixth consecutive game, breaking the previous mark set by current Padres first-base coach Dave Roberts (2006) and former San Diego outfielder Alan Wiggins (1983).
On July 21, Maybin tied a career best with four hits, adding two stolen bases and two runs. It was his third four-hit game of the season, most by any center fielder in the Majors this year.
Maybin has been held out of the Padres' lineup since injuring his left hip flexor in Sunday's game. He has hit safely in a career-best 10 consecutive games since the All-Star break.