By Matt Rappa, Sports Talk Philly editor 
The Philadelphia Phillies got their long-coveted free agent starter Sunday afternoon in signing former Cy Young Award winner RHP Jake Arrieta to a three-year, $75 million deal that could max out at five years and $125-$135 million.
The blockbuster signing has caught attention around the league, and of course within the Phillies' clubhouse, such as Rhys Hoskins calling the acquisition "very, very exciting."
For a rotation which last season allowed the seventh-most hits (936), 11th-most runs (509), sixth-most home runs (150) and 15th-most walks (306), the addition of Arrieta will already make a noticeable impact for the Phillies in their first season under manager Gabe Kapler.
Even after signing Arrieta, the club may not be done in their efforts to improve the rotation.
On March 1, MLB.com's Jon Morosi reported the Phillies have "entertained the possibility" to sign two free agent starting pitchers this offseason. Morosi said that "while not likely to occur, the situation is financially plausible."
Heading into the final few weeks of spring training, Vice President and General Manager Matt Klentak, and company, are halfway there in making such possibility a reality.
The Phillies surely have sufficient funds to add another starter to complement the likely mix of Arrieta, Aaron Nola, Jerad Eickhoff and Vince Velasquez. While Arrieta adds $30 millon to the Phillies' contract commitments for 2018, their $75,378,833 total payroll still ranks 27th in baseball, well under the league average, according to Spotrac.
So, if the Phillies were to sign another starter, who is left unsigned so late into spring training? The following 13 starting pitchers remain available, according to MLBTradeRumors.com: Brett Anderson (30 years old), Clay Buchholz (33), Trevor Cahill (30), Alex Cobb (30), R.A. Dickey (43), Scott Feldman (35), Matt Garza (34), Jeremy Hellickson (31), Ubaldo Jimenez (34), John Lackey (39), Jeff Locke (30), Jake Peavy (37), Anibal Sanchez (34) and Chris Smith (37).
Two names that would likely catch the Phillies' attention the most are right-hander Alex Cobb, who is perceived to be the last of three top-sought-after starters after Arrieta and the recently-signed Lance Lynn, and former club right-hander Jeremy Hellickson.
Cobb posted a 3.52 ERA and 1.19 WHIP in 64 innings after last season's All-Star break, recovered from injury-riddled 2015 and 2016 seasons (Tommy John surgery). Hellickson, meanwhile, started in 52 games for the Phillies from 2016-2017 before being dealt to the Baltimore Orioles last July for Hyun Soo Kim and minor league southpaw Garrett Cleavinger.
The Sunday signing of Arrieta reunited the right-hander with former Orioles and current Phillies brass which drafted him in the fifth round of the 2007 amateur draft out of Texas Christian University: President Andy MacPhail, Vice President and General Manager Matt Klentak, Assistant General Managers Scott Proefrock and Ned Rice, and Director of Player Development Joe Jordan.
Perhaps former Tampa Bay Rays in Kapler and Phillies Major League Player Information Coordinator Sam Fuld would like to reunite with a former teammate of their own. Kapler played alongside Hellickson in Tampa in 2010, while Fuld was teammates with both Cobb and Hellickson from 2011-2013. Of course, free agent RHP Matt Garza was also a Tampa Bay Ray and teammates with Kapler from 2009-2010, however he just underwent shoulder surgery in January to repair a torn labrum.
The Phillies would have to surrender their fourth-highest draft pick if they come to terms with Cobb, however, as he rejected the Rays' one-year, $17.4 million qualifying offer in November. The Phillies already lost their second and third-highest picks to the Cleveland Indians and Chicago Cubs in signing Carlos Santana and Jake Arrieta.
Adding Arrieta already adds at least a few wins to the Phillies' win total for 2018. The addition of another starter and anywhere from $10-20 million in additional payroll might just be the move that lifts the Phillies even more, perhaps as far as into postseason contention for the first time since 2011.
