Port Adelaide forward Matt White has been ruled out for at least three months due to a tear in his right pectoral muscle.

The 28-year-old suffered the injury during the first quarter of Port’s win over St Kilda on Sunday.

“It’s a complete rupture to the pectoral muscle, which for Whitey will mean he misses at least 12 weeks,” Port high performance manager Darren Burgess said.

“It’s really disappointing for him; unfortunately the symptoms present similar irrespective of the severity of the injury, so we couldn’t confirm the detail until the scans.

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“He’ll spend six weeks in a sling and then we’ll progress as required after that.”