Answer based on context:

Hoping to avenge their Week 3 loss at Buffalo, the Patriots flew across the country to face the Oakland Raiders. The Raiders grabbed the lead in the first quarter, with a 28-yard field goal by placekicker Sebastian Janikowski. The Patriots responded, with quarterback Tom Brady throwing a 15-yard touchdown pass to wide receiver Wes Welker. The Raiders re-claimed the lead in the second quarter, with a 1-yard touchdown run from running back Michael Bush. The Patriots answered, with a 1-yard touchdown run from running back BenJarvus Green-Ellis, followed by a 44-yard field goal by placekicker Stephen Gostkowski just before halftime. The Patriots added to their lead in the third quarter, with a 33-yard TD-run by running back Stevan Ridley. The Raiders narrowed the lead, with a 26-yard field goal by Janikowski, but the Patriots increased it in the fourth quarter, with a 4-yard touchdown pass from Brady to wide receiver Deion Branch. The Raiders scored a late touchdown, with quarterback Jason Campbell throwing a 6-yard pass to wide receiver Denarius Moore (with a failed two-point conversion attempt), but the Patriots ran out the clock, sealing the win. With the win, the Patriots improved to 3-1; it was also the franchise's 200th win (regular season and playoff) under Robert Kraft's ownership.

How many yards was the shortest field goal?
26