Complex sentence: Walter entered the Packers game early in the fourth quarter in relief of McCown and completed 5 of 8 passes for 38 yards as the Raiders lost to the Packers by a score of 38-7.
Split into simpler sentences: Walter entered the Packers game in the fourth quarter in relief of McCown and completed 5 of 8 passes for 38 yards. The Raiders lost to the Packers by a score of 38-7.