49ers free agent guard Andrew Tiller is visiting the Chiefs today, a league source tells Matt Barrows of The Sacramento Bee (on Twitter). Tiller has started 14 games over the last two seasons for San Francisco. 
The Chiefs presently have three true guards on the roster in Laurent Duvernay-Tardif, Zach Fulton, and Parker Ehinger. After that, they have a pair of guard/tackles in Jah Reid and Mike Person. If Tiller signs with KC, he’ll likely get a partial guarantee on his deal and that could displace one of the team’s reserve offensive linemen.
We haven’t heard Tiller’s name come up much this month and this is his first reported free agent visit. At this stage of free agency, we have Tiller ranked as one of the five best free agent interior offensive linemen remaining on the board. Only Jahri Evans, Nick Mangold, Tim Lelito, and John Sullivan are ahead of him on the list.
The Niners’ level of interest in keeping Tiller isn’t immediately clear. The team currently has nine offensive linemen under contract, including newly-acquired center Jeremy Zuttah.