Breaking down preseason schedule

Some thoughts on the San Francisco 49ers' preseason schedule:

The schedule: Week 1 Aug. 7 at Ravens; Week 2 (Aug. 14-18) vs. Denver; Week 3 (Aug. 24) vs. Chargers; Week 4 (Aug. 28) at Houston.

Harbaugh Bowl: Jim Harbaugh and John Harbaugh will meet on the field for the first time since the Ravens edged the 49ers in the Super Bowl in February, 2013. The idea of the 49ers going out to Maryland for some practices before the game makes sense. It’s a long way to go just for one preseason game. The brothers would likely be intrigued by the idea of some controlled scrimmages. Expect the 49ers to start training camp July 23 because it is 15 days before the start of the preseason.

Breaking in Levi's: The first preseason game at the 49ers’ new stadium, Levi’s Stadium in Santa Clara, will be in Week 2 of the preseason against Denver.

The game that matters: The 49ers will have some motivation to look good in the most important preseason game. Their third preseason game (it’s the game starters play the longest) will be at home against the Chargers. It will be a nationally televised game on Fox.

Raiders' embargo lives: For the third straight year the 49ers and Bay Area rival Raiders will not play in the preseason. The annual series was put on hold after major violence broke out at the 2011 game. The 49ers visit Oakland in the regular season.