Dear Brad Guth:

On Tuesday, September 4, 2012 7:07:01 AM UTC-7, Brad Guth wrote:
....
However, if the encounter with a red dwarf
included its lithobraking via Saturn or Jupiter,
as such could allow for the capture.

Nope. "Conservation of angular momentum". Were the red dwarf to come close enough to either of those two gas giants, it would consume them, and the Sun would have one less gas giant as it went back out-system.

David A. Smith