Approximately $500,000 in jewelry and electronics was stolen from Alex Rodriguez's rental vehicle on Sunday, sources told Evan Sernoffsky and Phil Matier of the San Francisco Chronicle.
ESPN said it was working with local authorities.
According to TMZ, the items were worth over $500,000 but Alex's rep says the item's value are being "grossly exaggerated".
In a separate statement, the sportsman claimed police officials had video footage of the perpetrators, adding: "I am saddened that several items that were of a personal nature and irreplaceable with sentimental value were taken".
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Rodriguez's co-analyst on the ESPN program, Jessica Mendoza, missed Sunday's telecast after she was involved in a vehicle collision Friday. The auto was parked roughly three blocks from Oracle Park, and the culprit made off with an estimated $500,000 in items including a laptop, camera and jewelry.
According to the source, ESPN rented a black Nissan SUV for Rodriguez and other members of the production staff.
According to the Chronicle, 2,150 vehicle break-ins were reported in San Francisco in July, or about 69 per day, as part of what the newspaper has characterized as a "rolling epidemic" in the city.
The case is now a high priority investigation according to The Chronicle, and takes place during a time when auto break ins are an epidemic throughout San Francisco.