Gonzalez was winless in four decisions at three different levels in the minors but performed well enough to record a 3.11 ERA. He struggled with his control with 26 walks in 46 1/3 innings.
"We're going to give him every opportunity to be in our rotation," Amaro said via MLB.com. "We have to try to create as many opportunities for starting pitching as we possibly can. We're not going to be able to go through a season with five or six pitchers. It's probably going to take seven to 10 pitchers.
"He personally feels more comfortable being in the rotation. Whether or not he can provide that remains to be seen. But after speaking with him it was very important to him to be prepared mentally and physically for this offseason to get stretched out."
Gonzalez was promoted to the Phillies in September and yielded four runs on nine hits in 5 1/3 innings.
"We need impact starting pitching," he told CSNChicago.com. "If you can add a top-of-the-rotation starter to what we have with (Jake) Arrieta, et al, it becomes really, really interesting in a hurry. We also could use just another quality, stable arm to go with it. So in an ideal world, we'll add two starting pitchers."
Epstein admitted he made a mistake in his disastrous signing of Edwin Jackson to a four-year, $52 million deal, which will pale in comparison to the money destined for potential free agents Jon Lester and Max Scherzer this winter. Jackson is 14-33 with a 5.58 ERA in two years with the Cubs, who are on the hook for two more seasons. But Epstein realizes that he must return to the free agent market to sufficiently improve his staff.
"I'm very confident that we'll add impact pitching from outside the organization," he said. "It has a chance to happen this winter. But we're not going to make any guarantees."
Bumgarner (3-1) continued to look excellent fresh off winning the NLCS MVP award. He fired six scoreless innings and was up 7-0 before surrendering a solo home run in the bottom of the seventh. Bumgarner has delivered a 1.40 ERA, 0.72 WHIP and 33:6 K:BB ratio in 38 2/3 postseason innings spanning five starts. He'll get the ball in Game 5 Sunday if the Royals can avoid a sweep. Game 2 is set for Wednesday in Kansas City.
Shields (1-1) hadn't been having a great postseason despite the Royals' impressive run of wins, giving up 10 earned runs in 16 innings heading into his Game 1 start. His night turned south immediately Tuesday, as the Giants followed up a one-out, RBI double with a two-run home run to take a 3-0 lead in the first inning. Shields retired seven straight heading into the fourth, where he opened the inning with a double, walk and RBI single to get the hook. The loss, which was the first of the postseason for the Royals, puts the AL pennant winner in a 1-0 hole going into Game 2 Wednesday in Kansas City.
"It's definitely a huge relief," Sabathia said. "I feel good enough to do all my workouts, to play catch and kind of have a normal offseason."
Sabathia, who underwent season-ending knee surgery in July, starting throwing off flat ground in late September and plans to report to spring training early.
James Shields takes the mound in Game 1 Tuesday, while rookie Yordano Ventura is slated to pitch Game 3. If the series reaches five games, Shields would likely be in line to start Game 5 Sunday.
Wacha has been dealing with a stress reaction in his right shoulder, but he is expected to follow his normal offseason program. "Even the doctors were a little surprised on how that looked," general manager John Mozeliak said.
Williams went 4-2 with a 2.83 ERA, 1.13 WHIP and 38:17 K:BB ratio in 57 1/3 innings over nine starts after joining the team off waivers in August. He has pitched for seven teams while compiling a 4.40 ERA in 891 1/3 career innings.
"Taijuan is completely healthy and was very impressive in his two outings, but made a personal decision that he needed to return home at this time," general manager Jack Zduriencik said in a statement. "He will continue with his offseason program and we look forward to seeing him at spring training in February."
Walker posted a 2.00 ERA in his two AFL starts, striking out 11 and walking two in nine innings of work.