Quality of broccoli out of California has been poor for a few weeks now. This is due to wet mornings followed by hot sun causing pin rot (browning of the stems) to progress rapidly.
Mexico has had a lot of rain in their growing region, which has caused delays in harvesting. Both factors have caused heavy allocations from the shippers and the product that is coming in is marginal in quality.
Expect high prices, shorts, and lower quality for the next month.