Baalke speaks with Mike Shanahan

The month of March is just over a week away, which means the 49ers may soon do something that will have a profound impact on their team for years to come. It's not much of a stretch to expect that to happen, at least based on what the team has done during the month of March in the four years that general manager John Lynch and head coach Kyle Shanahan have been together. The 49ers have made a slew of March roster moves in that time, some of which made major headlines across the NFL. A few of those moves paid off for the 49ers, while others have had little or no impact -- or have even been impactful in a negative way. Here's a look back at ten March moves in particular that left a positive or negative mark (or both). 10. Signing defensive end

Last year, Kyle Shanahan watched as Patrick Mahomes rallied his team late in the Super Bowl to dash the San Francisco 49ers' hopes of a sixth championship. With Deshaun Watson wanting out of Houston and interested teams contemplating what it might take to acquire the quarterback, should he force a trade, the coach has to look back at 2017 with at least a little regret. The 49ers could have had Watson — or Mahomes for that matter — and perhaps never would have had to wonder "what if?" The 49ers passed on both quarterbacks because the plan was to acquire Kirk Cousins during the rebuilding process. So Shanahan and general manager John Lynch used their first-ever draft pick as a duo on defensive lineman Solomon Thomas. It's been assumed that Shanahan is