The other guy is new pitching coach Scott Radinsky.  The news is nothing new.  The top four rotation spots are taken by (in order) 
Justin Masterson, 
Ubaldo Jimenez, 
Josh Tomlin and 
Lowe.  The guys fighting for the fifth spot are 
Kevin Slowey, 
Jeanmar Gomez, 
David Huff, 
Zach McAllister and 
Scott Barnes.
Also, 
Carlos Santana will see time at DH as the team sees 
Casey Kotchman as an every day guy.  This means more ABs for 
Lou Marson and fewer for 
Travis Hafner. 
But we knew all of this already.  Right?
Cheers.