The attack, a video of which has been widely shared on social media this week, happened outside Kelso Rugby Club’s club rooms at Poynder Park at around 8.15pm on Saturday.
A Police Scotland spokesman said: “Police in the Scottish Borders are appealing for witnesses following an assault at the Kelso Rugby Club.
“The incident happened around 8.15pm on Saturday, August 25.
“A 47-year-old man was attacked by a group of youths outside the ground and was taken to Borders General Hospital before later being released.
“Inquiries to identify those responsible are ongoing and anyone with information is asked to contact police immediately, quoting incident number 4585 of the August 25.”
A video showing part the attack has been shared on Facebook by more than 4,600 people since this week and viewed more than 210,000 times.
The video can be seen online at: https://www.facebook.com/robinarmstrongcomedy/videos/241836133131231