Minnesota Vikings running back Adrian Peterson will make his first preseason appearance since 2011 when the Vikings face the San Francisco 49ers next Sunday in San Francisco, coach Leslie Frazier said Sunday.

"Yeah, it definitely makes a difference [not having Peterson]," coach Leslie Frazier said, according to the Minneapolis Star-Tribune. "That will be obvious when we open up the season. It's obvious if you look at us from a season ago and it showed on Friday night [a 20-16 loss at Buffalo]."

Without Peterson in the Vikings' first two preseason games, only one of the six drives by the Vikings' first-team offense lasted longer than three plays or went farther than 15 yards.

Frazier said Peterson will not play more than a half against the 49ers, although he did not specify how much Peterson will play.

Peterson didn't play in the preseason last year as he recovered from ACL surgery on his left knee. He wound up rushing for 2,097 yards during the regular season and was named the NFL's MVP.

To avoid a risk of injury this season, the Vikings held Peterson out of the first two preseason games this year, and some suspected he might not play at all in the preseason. However, he will get some work next weekend.