After four weeks, only three unbeaten teams remain: the AFC's War Pony and Negligent Discharges and the NFC's Arrogant Americans. Meanwhile, the AFC's Redlegs, the NFC's Whackers, and the PFC's Orangebloods and Boomtown Brawlers are 0-4. Interestingly, both the Redlegs and Brawlers are two-time champions while the Whackers are former champions as well. 
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The conclusion of Week Four also coincides with the initial release of OPR rankings. A team's OPR gives more context to its record: a team with a great record may rank much lower in OPR than teams with worse records, perhaps signaling a market correction to come. For example, the Nightmares are 3-1 but are ranked just below the 1-3 Havoc in OPR with an expected W-L record of 7-6, which is based on the correlation of OPR and final record over 20+ seasons of data. 
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