Knit hats, "ugly sweaters," NHL jerseys, women's apparel and Derek Jeter merchandise.
Those best-selling items are leading the pack at Fanatics.com, the online sports retailer that expects to process 10 times normal volume — roughly 700,000 packages — on Cyber Monday.
In addition to running Fanatics.com, the retailer also powers 300 websites for all the major U.S. sports leagues, as well as collegiate and other professional teams, and some retailers such as J.C. Penney.
"Today will be the single biggest sales day in the history of our company," Fanatics CEO Doug Mack said.
Wall Street is carefully watching online sales data to get a better read on consumer spending this holiday, particularly after a report from the National Retail Federation estimated that total Black Friday sales over the four-day shopping period fell 11 percent.
Online continues to be a bright spot for retailers, with IBM saying digital sales grew 17 percent over the weekend.