The San Francisco 49ers and Kyle Shanahan were ecstatic to get Jerick McKinnon back on the field for the first time since his injury last season. However, after practicing for two days following his activation from the PUP list, McKinnon needs a platelet-rich plasma injection in his surgically repaired knee and will miss at least two weeks, according to Shanahan:

This is untimely news as the 49ers are trying to get McKinnon back into their offense after missing the entire 2018 season due to injury. Nearly a year ago, McKinnon tore his ACL in practice and was unable to make his 49ers debut.

During the free-agency period in 2018, San Francisco had its sights set on bringing in McKinnon to bolster the backfield. The 49ers were confident he could become a featured back as they handed him a four-year deal worth over $30 million.

Unfortunately, the former Minnesota Vikings running back never got to suit up in a regular-season game in 2018. In his absence, Matt Breida, Raheem Mostert, and Jeff Wilson received playing time in the offense.

The last time we saw McKinnon on the field, the elusive running back was doing a little bit of everything for the Vikings. In his last two seasons in Minnesota, McKinnon rushed for 1,109 yards, snared 94 receptions, and scored nine total touchdowns.

With McKinnon's ability to be a receiver as well, Shanahan wants to get him heavily involved. The addition of Tevin Coleman this offseason also adds another wrinkle to the offense. Shanahan coached Coleman when he was the offensive coordinator of the Atlanta Falcons.

San Francisco has to hope this is just a precautionary measure for Jerick McKinnon and not a sign of things to come with his knee.