Upon Further Review: San Francisco 49ers

An examination of four hot issues from the San Francisco 49ers' 31-17 victory against the Tennessee Titans:

49ers are hot: The 49ers have won four straight games after starting 1-2. They are 5-2 and play the winless Jacksonville Jaguars in London on Sunday before the bye. The 49ers are clicking in all three phases of the game and has scored at least 31 points in all four games. The 49ers have scored 30 or more points five times. It is the second most in the league behind Denver, which has scored 30 or more points in all seven games.

Read-option lives: The 49ers used the read-option offense Sunday more than any point this season -- seven times for 42 yards. Quarterback Colin Kaepernick had 35 yards on five carries, including one for a 20-yard touchdown run. The 49ers have run the read-option offense nine times total this season, according to ESPN Stats & Information. The 49ers are running well during their four-game win streak. According to ESPN Stats & Information, the 49ers have called designed runs on 59 percent of their plays during the streak, a big turnaround from the start of their season. In the 49ers’ first three games, designed runs were called on 35 percent of their plays.

49ers taking advantage of turnovers: The 49ers have forced 12 turnovers during the winning streak and have scored points off every one -- eight touchdowns and four field goals. That in itself has played a huge role in the string of victories.

Safeties should be fine: San Francisco safety Donte Whitner left the game in the third quarter with a knee injury. Early indications are that the injury may not be serious. But he will be monitored as the week goes on. Fellow starting safety, rookie Eric Reid, had to leave the game briefly in the fourth quarter with an ankle injury. He returned to the game. He said after the game he was fine.