When it comes to sportsmanship, Jonathan Goodwin sets the standard. The 49ers center has never received a personal-foul penalty, at any level of football, and has never been fined by the NFL in his 12-year, 179-game career. What does this say about him? The soft-spoken Goodwin smiled today. “I’m mean,” he said. “But not that mean.” Given that backdrop, perhaps it’s not surprising that Goodwin, 35, was selected by his teammates as the winner of the Ed Block Courage Award, given annually to the player that exemplifies a commitment to sportsmanship and courage. In addition to his good manners, Goodwin has plenty of grit. Despite playing in the middle of the NFL’s trenches, he’s started 84 straight games, the third-longest streak among active centers. It remains to be seen, however, how many more games Goodwin will play with the 49ers. Goodwin is in the final season of his contract and is earning a $2.5 million base salary after accepting a $1.2 million pay cut in May. Goodwin said he’s at least considered retiring after the season. The 49ers might have Goodwin’s heir apparent waiting in the wings in two recent draft picks: Daniel Kilgore, 26, or Joe Looney, 23. Goodwin said he hasn’t discussed his future with the 49ers.