The news that the Los Angeles Chargers would host free agent tight end David Njoku on a visit sort of came and went.  Njoku was apparently slated for a visit with the Chargers to start the week. The idea of the former Cleveland Browns star linking up with a quarterback like Justin Herbert and an offensive coordinator like Mike McDaniel was really fun, to say the least.  Granted, the Chargers have a breakout second-year tight end on their hands with Oronde Gadsden. They signed Charlie Kolar . A free agent joining the mix would need to be content with a split role and, given the frugal nature of the Chargers and the type of contract that comes with it.  Here’s a quick look at some free agent tight ends still out there, now that it’s clear the Chargers want to add help.  Jonnu Smith Jonnu Smith | Scott Galvin-Imagn Images The Pittsburgh Steelers cut Jonnu Smith to save salary cap. He played 17 games there last season, catching 38 passes for 222 yards and two scores.…