HOW TO QUICK-FIX THE COLTS' RUN DEFENSE?The problem is obvious, the solution a lot less so. Nonetheless, the worse the Indianapolis Colts' run defense has become, the faster the quick-fix opinions flood in.Here are some of the more popular theories among fans and pundits, with an analysis of their merits by Star reporter Phil Richards.If the linebackers can't tackle, try someone else.The Colts did that when Rocky Boiman took over on the strong side during the second quarter at Jacksonville. Boiman finished with seven tackles, starter Gilbert Gardner with two.Either Boiman or Rob Morris or both could play this week; coach Tony Dungy said he's looking at his options. Morris made 23 total tackles against Buffalo and Dallas when starting middle linebacker Gary Brackett was injured. The Bills ran for 111 yards, the Cowboys for 117, two of the Colts' best days.Bring the defensive ends into the run game rather than having them rush the passer headlong every snap.That adjustment was made against Jacksonville. Ends Dwight Freeney and Robert Mathis didn't get as deep or as wide as they had most of the season, when they regularly took themselves out of plays and opened gaping voids. Freeney made a season-high six tackles, Mathis had four with a sack. The Jaguars still found plenty of room, and an absence of linebackers.Switch from a 4-3 to a 3-4 alignment. Most of the best defenses play it.The Colts don't have the personnel for the three-linemen/four-linebackers set. No 320-pound nose tackle. No 300-pound tackle/end types who are as effective inside as outside. And they don't have four linebackers with the size and versatility needed.Blitz more, particularly with the linebackers.Blitzes can stop the run, if you guess right, but they're more likely to open voids for ball carriers, and the Colts' cover-2 scheme is designed to get pass-rush pressure with the front four. That frees the linebackers and defensive backs to play zone coverages, to face the quarterback and presumably make more plays, against the run and the pass.Move Raheem Brock from tackle back to end and return Robert Mathis to his role as situational pass rusher and special teams standout.End is the 274-pound Brock's natural position, but the Colts have no tackle to replace him who can play at his level. Mathis would be a boon to the Colts' woeful coverage teams, but he has been the team's most effective defensive lineman. They need as many snaps from him as they can get.