Care tag is frayed so I wasn't able to make out the size, but based on others, it appears to be an XL. Please double check. There is also a stain near the cuff on the right sleeve (pictured left), see last 2 photos. Pilling present along side seams. 
Unsure if this one is vintage, most others are made overseas

The Vintage Patagonia R1 Regulator Fleece Pullover in Toad Green is a classic piece of men's clothing made in the USA. This XL sweater features a tight-knit fleece fabric with a mock neck and long sleeves, making it perfect for casual or workwear occasions during the winter, fall, or spring seasons. The pullover style, 1/2 zip feature, and embroidered logo accents add to its appeal, while its solid green color and outdoor theme showcase a timeless design that is both comfortable and stylish. Ideal for walking and hiking activities, this sweater is a must-have for any wardrobe.