The Vikings won’t have Mackensie Alexander on the field for Saturday’s game against the 49ers. The cornerback will undergo arthroscopic surgery for the small tear in his lateral meniscus, a source tells NFL.com’s Tom Pelissero (on Twitter). 
On the plus side – Alexander’s season isn’t necessarily over. If the Vikings advance, Alexander could conceivably return for the NFC title game or the Super Bowl.
The Vikings managed to upset the Saints in the opening round of the playoffs, despite not having Alexander or Mike Hughes on the field. Their other cornerbacks – Trae Waynes, Xavier Rhodes, and Holton Hill – will be tasked with holding down the fort yet again as they face the Niners’ potent offense.
If the Vikings fall to the Niners, that could mark the end of Alexander’s career in purple. The cornerback is scheduled to reach free agency in March.